高中英语CloningSectionⅢGrammar_同位语及同位语从句教学案新人教版
Section Ⅲ Grammar—同位语及同位语从句
语法图解
探究发现
①We two, Mr. Lee and myself, had a talk privately.
②All the Chinese people, old and young, love our socialist country.
③Altogether Dolly lived six and a half years, half the length of the life of the original sheep.
④The fact that she seemed to develop normally was very encouraging.
⑤Then came the disturbing news that Dolly had become seriously ill.
⑥We'll discuss the problem whether the sports meeting will be held on time.
⑦I have no idea who will be in charge of the company when the manager is away.
⑧The question why so many people would choose to live in the countryside but to work in the city is still under discussion.
[我的发现]
(1)以上句子中加黑部分是同位语。同位语可以由名词、代词、数词、形容词或从句来充当。句③是由名词短语作同位语；句②是由形容词短语作同位语；句④和句⑤是由that 引导的同位语从句。
(2)在主从复合句中作同位语的从句称为同位语从句。从句④－⑧可以看出，同位语从句一般用that,_whether,_who,_why等词引导。
(3)同位语从句常放在fact,_idea,_question,_problem,_news等抽象名词后面，说明该名词的具体内容。
一、同位语
一个名词或代词后面有时可以跟一个名词(或起类似作用的其他形式)，对前者进一步说明，这一部分就叫作同位语。可充当同位语的有名词(词组)、代词、数词、形容词(短语)、动名词(短语)、不定式(短语)及从句等。
1．名词、代词或数词充当同位语
We teachers should be responsible for this.
我们老师应该为此负责。(名词作同位语)
They each put forward a proposal.
他们每个人都提出了一个建议。(代词作同位语)
You may leave it to us two.
你可以把这事留给我们俩。(数词作同位语)
2．名词词组、形容词(词组)、动名词(短语)、不定式(短语)等充当同位语
Mr. Robeson, our head teacher, is from Canada.
我们的班主任罗伯逊先生，来自加拿大。(名词词组作同位语)
Is this your purpose, to avoid being punished?
逃避惩罚，这就是你的目的？(不定式短语作同位语)
The current fair, the biggest in its history, is being held in a big city.
目前的交易会，是有史以来规模最大的，正在一座大城市举行。(形容词短语作同位语) The first plan, attacking at night, was turned down.
第一个计划是夜袭，被拒绝了。(动名词短语作同位语)
[即时演练1]
写出下列句中充当同位语的词(组)词性
①We both have a chance to take part in this activity. 代词
②Please bring these books to them three. 数词
③Wang Bing, our monitor, will help us to turn in our papers. 名词短语
④Is this what you have done, leaving all these things in a mess? 动名词短语
⑤People, old and young, went to the street to watch the parade.形容词词组
二、同位语从句
在复合句中充当同位语的名词性从句叫同位语从句。它一般跟在某个名词后面，用来说明前面名词的具体内容。常见的这类名词有：fact, news, hope, truth, idea, suggestion, thought, question, promise, order, problem, belief, word, message, information, proof, announcement, desire, doubt, proposal, advice, possibility等。
His accent at once betrayed the fact that he was a foreigner.
他的口音立刻显示出他是一个外国人。
The news that he was in trouble determined me to act at once.
他陷入困境的消息，使我决心立即行动。
All of us know the truth that the world is made of matter.
我们大家都知道世界是由物质构成的这个事实。
Why are they surprised at the idea that he will retire next year?
他们为什么对他将在明年退休的想法感到惊讶？
[即时演练2] 补全句子
①We finally got the information that_the_ticket_price_had_gone_up.
我们终于得到了票价已上升的信息。
②Do you know the fact that_the_famous_actor_has_already_got_married?
你知道这位著名的演员已经结婚的事实吗？
③She announced her decision that_she_would_have_a_journey_alone.
她宣布了她将会独自旅行的决定。
三、同位语从句的连接词
1．连接词that, whether
that引导同位语从句时，不充当句子成分，也没有词义，一般不能省略。whether引导同位语从句时，意为“是否”，但仅起引导作用，在句中并不作成分，不可以用if替换。
The news that our team has won the match is true.
我们队获胜的消息是真实的。
There is some doubt whether John will come on time.
有人怀疑约翰是否会准时到来。
2．连接代词who, what, which, whom, whose
连接代词who, what, which, whom, whose引导同位语从句时，在从句中作主语、宾语或表语等；其意义分别为“谁”“什么”“哪一个”“谁”“谁的”。
The question who should clean the room has been solved.
谁该打扫房间的问题已经解决了。
I have no idea what he is up to now.
我不知道他现在干什么。
With time going, the doubt which of the team would win disappear.
随着时间的推进，哪支队伍会赢得这场比赛的疑问消失了。
The problem whom he would take the place of was discussed in the meeting over and over again.
他将代替谁这个问题在会议上被反复讨论。
The message whose responsibility it was known to all.
大家都知道了谁承担责任的消息。
3．连接副词when, where, why和how
连接副词when, where, why, how引导同位语从句时则在句中作时间、地点、原因和方式状语；其意义分别为“什么时间”“哪里”“为什么”“怎么样”。
They have no idea when I will go back.
他们不知道我什么时候回去。
I have no idea where he has gone.
我不知道他去了哪里。
I have no idea why he gave up.
我不知道他为什么放弃了。
I have no impression how he went home.
他是怎样回家的，我没有印象。
[即时演练3]
(1)在下列句中填入恰当的引导词
①(2016·天津高考改编)The manager put forward a suggestion that we should have an assistant. There is too much work to do.
②(2014·重庆高考改编)— Is it true that Mike refused an offer from Yale University yesterday?
—Yeah, but I have no idea why he did it; that's one of his favorite universities.
③(2013·浙江高考改编)The only way to succeed at the highest level is to have total belief that you are better than anyone else on the sports field.
(2)将下面句子合并为同位语从句
Two fifths of all girls in America are on a diet. The fact worries their parents and teachers a lot.
→The fact that_two_fifths_of_all_girls_in_America_are_on_a_diet worries their parents and teachers a lot.
四、同位语从句的几个注意事项
1．同位语从句中的虚拟语气
名词suggestion, order, demand, command, request等后的同位语从句要用虚拟语气，即从句谓语用“(should) do”的形式。
The order that all the soldiers should set off at once was given by the general.
所有士兵立刻动身出发的命令是由将军下达的。
The suggestion that everyone should make efforts to beautify our campus is necessary.
每个人都应尽力来美化校园的建议是必要的。
2．doubt与同位语从句
名词doubt(怀疑)用于肯定句中，其后面的同位语从句用whether引导； no doubt (毫无疑问)用于否定句中，其后面的同位语从句用that引导。
There is no doubt that he will come.
毫无疑问他会来的。(no doubt表示肯定概念)
We have some doubt whether they can complete the task on time.
我们怀疑他们能否按时完成任务。(some doubt表示不确定的概念)
3．分隔式同位语从句
有时同位语从句与其所解释说明的名词会被其他成分隔开，从而形成分隔式同位语从句，这样做主要是为了保持句子结构平衡，避免头重脚轻。
A saying goes that where there is life, there is hope.
谚语说：留得青山在，不怕没柴烧。(that引导的同位语从句，说明saying的内容) [即时演练4] 单句语法填空
①Word came that their team had won the important game.
②There is some doubt whether they will accept the advice or not.
③He gave his daughter some advice that she (should)_make (make) good use of her holiday.
④I have no doubt that we need some help to do the work.
五、同位语从句和定语从句的区别
错误!
[巧学助记] 同位语从句用法口诀
同位语从句似“定从”，两种句式有异同；
从句均在名词后，定“限”同“释”要分清；
定从“that”宾可省，同位从句“that”不省。
[名师点津] 同位语从句的简易判断方法
我们可以在名词和从句之间加be动词，使之构成一个新句子，如果合乎逻辑、句子通
顺，则是同位语从句。
[即时演练5]
填入适当的连接词并判断下列各句是同位语从句还是定语从句
①I have no idea when they will come to Shanghai？同位语从句
②The information that you got yesterday is very useful. 定语从句
③The information that you gave me yesterday is very useful. 同位语从句
④We all have those unforgettable days when we together had a meaningful time.定语从句
Ⅰ.用适当的连接词填空
1．I have no idea when we will have a good rest.
2．The question whether we need more time to do the work has not been discussed.
3．We express the hope that they will come to visit China again.
4．The suggestion that he gave me is practical.
5．The news that/which you told us yesterday is true.
6．Information has been put forward that more middle school graduates will be admitted into universities.
7．There is a feeling in me that we'll never know what a UFO is — not ever.
8．We all know the fact that China has a history of over five thousand years.
9．The proposal had been put forward, and then arose the question where we were to get the proofs needed.
10．There is much discussion about the question how the rising food prices are affecting ordinary people.
Ⅱ.单句写作
1．The news that_they_had_won_the_game soon spread over the whole school.
他们比赛获胜的消息很快传遍了整个学校。
2．I made a promise that_I_would_make_him_happy.
我保证过我会让他高兴。
3．We haven't yet settled the question how_we_can_raise_enough_money.
怎样才能筹集到足够的钱，这个问题我们还没有解决。
4．Our teacher gave us the suggestion where_we_should_spend_our_summer_holidays.
我们的老师就我们该去哪里度暑假提出了建议。
5．The question who_should_do_the_work requires consideration.
谁该做这项工作的问题需要考虑。
6．Many parents hold the view that_teenagers_shouldn't_spend_too_much_time online.
很多父母持有这样的观点：青少年不应该花太多时间上网。
7．I've just heard a warning on the radio that_a_rainstorm_is_likely_to_come.
我刚从收音机上听说了暴风雨有可能要来的警告。
8．The question whether_it_is_worth_doing will be discussed at the meeting.
这件事情是否值得做，这个问题将要在会议上被讨论。
Ⅲ.用同位语从句连接两个句子
1．The headmaster will join us in hiking this Sunday. We are glad at the news.
→We_are_glad_at_the_news_that_the_headmaster_will_join_us_in_hiking_this_S unday.
2．Where are we going for the holiday? Have you thought about the question?
→Have_you_thought_about_the_question_where_we_are_going_for_the_holiday?
3．A new teacher will teach us English next term. The message reached me yesterday.
→The_message_that_a_new_teacher_will_teach_us_English_next_term_reached_me _yesterday.
4．How did the accident come about? The driver refused to answer the policeman's question.
→The_driver_refused_to_answer_the_policeman's_question_how_the_accident_ca me_about.
5．His advice is acceptable. The work should be postponed to next week as a result of lack of tools.
→His_advice_that_the_work_should_be_postponed_to_next_week_as_a_result_of_ lack_of_tools_is_acceptable.
6．The fact has worried many scientists. The earth becoming warmer and warmer these years.
→The_fact_that_the_earth_becoming_warmer_and_warmer_these_years_has_worrie
d_many_scientists.
Ⅳ.语法填空
These days a debate about 1.whether we students should make friends online is discussed in our school. And opinions 2.differ (different) from person to person.
Those who are in favour 3.of it hold the view 4.that we should communicate with
others online. On the one hand, it is a fact 5.that we single children need more friends to keep away from the 6.loneliness (lonely). On the other hand, no one can deny that making friends online can 7.broaden (broad) our views. However, there are still some people 8.who are against it. They suggest that children concentrate more on their study, for they're too young to select good information online.
As far as I'm 9.concerned (concern), as long as directed in a right way, it will be 10.beneficial (benefit) for us students to make friends online.
高中英语同位语从句讲解及练习
高中英语同位语从句讲解及练习 同位语从句讲义及练习 一、理解同位语从句的含义，把握同位语从句的实质 在主从复合句中作同位语的从句称为同位语从句。同位语从句一般用that, whether，what, which, who, when, where, why, how 等词引导，常放在fact, news, idea, truth, hope, problem, information, wish,promise, answer, evidence, report, explanation, suggestion, conclusion等抽象名词后面，说明该名词的具体内容。换言之，同位语从句和所修饰的名词在内容上 为同一关系，对其内容作进一步说明。 例：The news that they had won the game soon spread over the whole school.他们比赛获胜的消息很快传遍了整个学校。 析：they had won the game说明The news的全部内容，因此该句为同位语从句。 二、正确运用同位语从句的引导词，准确把握同位语从句 1.如同位语从句意义完整，应用that引导同位语从句。（即that 不充当任何成分，只起连接作用，不可省略） 例：The general gave the order that the soldiers should cross the river at once.将军下达了战士们立即过河的命令。 析：the soldiers should cross the river at once是the order的全部内容，且意义完整，因此应用that引导同位语从句。 2.如同位语从句意义不完整，需增加"是否"的含义，应用whe】ther 引导同位语从句。（if不能引导同位语从句） 例：We'll discuss the problem whether the sports meeting will be held on time.我们将讨论运动会是否会如期举行的问题。 析：the sports meeting will be held on time意义不完整，应加"是否"的含义才能表达the problem的全部内容，因此应用whether引导同位语从句。 3.如同位语从句意义不完整，需增加"什么时候"、"什么地点"、"什么方式"等含义，应用when, where, how等词引导同位语从句。 例1：I have no idea when he will be back.
高中英语从句总结
高中英语从句总结 1）主语从句 1.定义：用作主语的从句叫做主语从句。 2.构成：关联词+简单句 3.引导主语从句的关联词有三类： （1）从属连词that.如：That they were in truth sisters was clear from the facial resemblance between them. 很明显，她们确是亲姐妹，她们的脸型很相似。 （2）从属连词whether.如： Whether he’ll come here isn’t clear.他是否会来这里还不清楚。 （3）连接代词who，whom，whose，what，which，whoever，whatever，whichever 连接副词 where，when，how，why.如： What she did is not yet known.她干了什么尚不清楚。 How this happened is not clear to anyone.这事怎样发生的，谁也不清楚。 Whoever comes is welcome.不论谁来都欢迎。 Wherever you are is my home —— my only home.你所在的任何地方就是我的家——我唯一的家。 解释： 1.主语从句能用it作形式上的主语。常以it作形式主语的句型有： +be+形容词（obvious，true，natural，surprising，good，wonderful，funny，possible，likely，certain，probable，etc.）+that从句。如： It is certain that she will do well in her exam.毫无疑问她考试成绩会很好。 It is probable that he told her everything.很可能他把一切都告诉她了。 +be+名词词组（no wonder，an honor，a good thing，a pity，no surprise，etc.）+that从句。如： It’s a pity that we can’t go.很遗憾我们不能去。 It’s no surprise that our team should have won the game.我们没赢这场比赛真意外。 +be+过去分词（said，reported，thought，expected，decided，announced，arranged，etc.）+that从句。如： It is said that has arrived in Beijing.据说格林先生已经到了北京。 It is reported that China has sent another man-made earth satellite into orbit. 据报道中国又成功地发射了一颗人造地球卫星。 +seem，happen等不及物动词及短语+that从句。如： It seems that Alice is not coming to the party at 似乎不来参加晚会。 It happened that I was out that day.碰巧我那天外出了。 +doesn’t matter（makes no difference，etc.）+连接代词或连接副词引起的主语从句。如： It doesn’t matter whether she will come or not.她是否来这无关紧要。 It makes no difference where we shall have the meeting.我们在哪里开会毫无区别。
高中英语分隔同位语从句
英语中，同位语从句一般是紧跟在所修饰的词后，但是，由于表达不同意义的需要，从句可以被其它句子成分隔开，这种从句叫做“分隔同位语从句（separate appositive clause）”。分隔同位语从句也是英语中比较常见的一种语言现象，现将分隔同位语从句简单归纳一下。 一、被状语隔开： 1、条件状语： I had the feeling---if one can actually receive feeling from Oliver Barrett Ⅲ---that he meant to give me the money. 假如一个人确实能够从奥利弗·巴雷特三世那儿得到感觉的话，那么，我觉得他打算给我钱。 2、程度状语： We have no idea at all that he has gone.我们一点儿都不知道他已经走了。 After that they gave their father the bags of gold and there is no doubt at all they all lived together happily ever after. 接着，他们把那几袋金子给了父亲，毫无疑问，从那儿以后，他们就幸福地生活在一起了。 It was most surprising that the mother wa sn’t surprised at the news at all that her son was knocked down by a car on his way to school.儿子在上学的路上被车撞倒，母亲得知此事竟毫不惊慌，这很是让人吃惊． 3、方式状语： We’ve just heard a warning on the radio that a hurricane is likely to come . 我
完整word版,同位语从句讲解及练习
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高中同位语从句专项语法习题
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同位语从句重难点解析及习题教学文案
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人教版高中英语【选修八】[知识点整理及重点题型梳理] 复习同位语
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同位语从句讲解及练习
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高中同位语从句___概念讲解
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高中-同位语从句详细讲解与练习(附答案)
同位语从句讲义 1．定义：用作同位语的从句叫做同位语从句。 2.用法：同位语从句的先行词多为fact, news, idea, thought, question, reply, report, remark等，关联词多用从属连词。如： They were all very much worried over the fact that you were sick.对你生病这件事，他们都很焦虑。 Where did you get the idea that I could not come?你在哪儿听说我不能来？ Early in the day came the news that Germany had declared war on Russia.德国已对俄国宣战的消息一大早就传来了。 注：同位语从句偶尔由从属连词whether引导。如：I have no idea whether he’ll come or not.我不知道他是否来。 连接代词who, which, what和连接副词where,when, why, how亦可引导同位语从句。 The question who should do the work requires consideration.谁该干这项工作，这个问题需要考虑。 W e haven’t yet settled the question where we are going to spend our summer vacation.到哪儿去度暑假，这个问题我们还没有决定。 It is a question how he did it.那是一个他如何做了此事的问题。 1．that引导的同位语从句与定语从句之区别? that引导的同位语从句 that引导的定语从句 句法功能上 that只起连接从句的作用，无意义。 在从句中不充当句子成分。 不可省。 that替代先行词在从句中不仅起连接作用， 还充当一个句子成分。如在从句中作 动词的宾语时可省略。 意义上 从句是被修饰名词的内容。 从句起限定作用，是定语 如： The news that Mr. Li will be our new English teacher is true. (同位语从句，that不可省) 李先生将是我们的新英语老师这个消息是真的。The news (that) he told me yesterday is true. (定语从句，that在从句中作的宾语，可省)他昨天告诉我的消息是真的。 2．一些表示“建议、命令、要求”的名词后所跟的同位语从句中，谓语动词用虚拟语气should+动词原形表示。should可省。如：This is our only request that this (should) be settled as soon as possible.这就是我们唯一的请求：尽快解决这个问题。 同位语从句 是名词性从句(主语从句、表语从句、宾语从句、同位语从句)中的主要从句之一，从句作同位语表示与之同位的名词(短语)的实际内容，它的作用相当于名词，对前面的名词(短语)加以补充说明或进一步解释，相当于一个表语从句，它们之间的关系是同位关系，即主表关系。 详细信息一个名词(或其它形式)对另一个名词或代词进行修饰，限定或说明，这个名词(或其它形式)就是同位语。同位语与被它限定的词的格要一致，并常常紧挨在一起。 1. 名词作同位语 Mr Wang, my child’s teacher, will be visiting us on Tuesday.王先生，我孩子的老师，星期二要来看我们。 2.短语作同位语 I, the oldest girl in the family, always had to care for the other children.我，作为家里最大的女孩，老得照料家中的其他孩子。 3. 直接引语作同位语 But now the question comes to their minds, “Did she die young because she was a clone?”但是现在他们不得不思考这样的问题：“多莉早死是因为它是一只克隆羊吗？” 4. 句子作同位语 The girls were surprised at the fact that ocean ships can sail up the Great lakes.巨大的海轮可以开到五大湖，让表姐妹俩感到吃惊。 同位语从句用法同位语部分是个句子,就是同位语从句,这种用法比较"固定" 一、在复合句中用作同位语的从句叫同位语从句。它一般跟在某些名词后面，用以说明该名词表示的具体内容。 I heard the news that our team had won．我听到了我们队获胜的消息。 二、可以跟同位语从句的名词通常有news，idea，fact，promise，question，doubt，thought，hope，message，suggestion，words（消息），possibility等。 I’ve come from Mr wang with a message that he won’t be able to see you this afternoon．我从王先生那里来，他让我告诉你他今天下午不能来看你了。 三、英语中引导同位语从句的词通有连词that，whether，连接副词how,when,where等。（注：if,which 不能引导同位语从句。） He must answer the question whether he agrees to it or not. 他必须回答他是否同意这样一个问题。
同位语从句讲解及习题
同位语从句讲解及习题 一、理解同位语从句的含义，把握同位语从句的实质 在主从复合句中作同位语的从句称为同位语从句。同位语从句一般用that, whether，what, which, who, when, where, why, how 等词引导，常放在fact, news, idea, truth, hope, problem, information, wish,promise, answer, evidence, report, explanation, suggestion, conclusion等抽象名词后面，说明该名词的具体内容。换言之，同位语从句和所修饰的名词在内容上为同一关系，对其内容作进一步说明。 例：The news that they had won the game soon spread over the whole school.他们比赛获胜的消息很快传遍了整个学校。 析：they had won the game说明The news的全部内容，因此该句为同位语从句。 二、正确运用同位语从句的引导词，准确把握同位语从句 1.如同位语从句意义完整，应用that引导同位语从句。（即that 不充当任何成分，只起连接作用，不可省略） 例：The general gave the order that the soldiers should cross the river at once.将军下达了战士们立即过河的命令。 析：the soldiers should cross the river at once是the order的全部内容，且意义完整，因此应用that引导同位语从句。 2.如同位语从句意义不完整，需增加"是否"的含义，应用whether引导同位语从句。（if不能引导同位语从句） 例：We'll discuss the problem whether the sports meeting will be held on time.我们将讨论运动会是否会如期举行的问题。 析：the sports meeting will be held on time意义不完整，应加"是否"的含义才能表达the problem的全部内容，因此应用whether引导同位语从句。 3.如同位语从句意义不完整，需增加"什么时候"、"什么地点"、"什么方式"等含义，应用when, where, how等词引导同位语从句。 例1：I have no idea when he will be back. 析：he will be back意义不完整，应加"什么时候"的含义才能表达idea 的全部内容，因此应用when引导同位语从句。
高考英语语法——同位语从句
Grammar—appositive clauses＆predicative clauses 名词性从句之同位语＆表语从句 同位语从句： I.明确概念与特征： 1. 同位语从句常放在名词之后，用来补充说明名词的具体内容。常用来接同位语从句的名词有news, idea, promise, question, doubt, wonder, fact, hope, wish, suggestion, advice, possibility, message, word, belief, information等。常用来引导同位语从句的连词有that, what, who, whether以及连接副词where, when, why, how 等。如： The news that their children couldn’t come back on time worried all the parents. I had no idea when the storm would end. 2. 不过有时候为了保持句子结构平衡，同位语从句也不一定直接放在名词后，而会出现隔离情况。如： Word came that the sports meet had been put off. Suddenly a good idea occurred to me that I could buy my teacher a gift. 3. 同位语从句前名词的数 同位语从句前的名词通常用单数形式，并且往往带有限定词加以修饰。如：Where did you get the idea that I could not come? Give me your promise that you will come to our party this evening. Exciting word came that I passed the exam. II. 正确选用引导词 一般来说根据句意来确定相应的引导词，并且从句要用陈述句的语序。 1.that引导同位语从句时在句中不作任何成分，但不可省略； The idea that we play football after class is great. 2.在表示是否的意思时连词只能用whether而不能用if； The question whether you can go to an ideal university depends on your effort. 3.从句若缺少主语,宾语或定语用连接代词（what, who, whom, whose, which），若缺少状语用连接副词（when, where, how, why）引导。 I have no idea which mobile phone is the best—it’s a matter of personal taste. At last I made a decision that I would never come back again. The question what we should do with this situation is under discussion. All of us had no idea why he refused our help. The question why he didn’t attend the meeting puzzled us. We can’t solve the problem how we can travel faster than light. 4.在名词doubt“怀疑”后的同位语从句用whether连接；在no doubt“不怀疑”之后的同位语从句用that连接。例如： There is no doubt that we will win the final match. I have a doubt whether he will finish the job on time. III. 注意从句中的时态 一般来说同位语从句的时态要和主句的时态保持一致。但在表示请求、命令、建议等意思的名词后的同位语从句中的谓语动词应用(should) do，(如demand, wish, suggestion, advice，order等)后面的同位语从句要用虚拟语气。如 I have no idea when he will be back. I accepted my father’s advice that I (should) apologize to my friend.
高中英语同位语从句知识点整理.doc
高中英语同位语从句知识点整理 1. 定义：用作同位语的从句叫做同位语从句。 2. 用法：同位语从句的先行词多为fact, news, idea, thought, question, reply, report, remark等，关联词多用从属连词that。例如：they were all very much worried over the fact that you were sick. 对你生病这件事，他们都很焦虑。where did you get the idea that i could not come? 你在哪儿听说我不能来?注：同位语从句偶尔由从属连词whether引导。例如：i have no idea whether he'll come or not. 我不知道他是否来。连接代词who, which, what和连接副词where, when, why, how亦可引导同位语从句。例如：the question who should do the work requires consideration. 谁该干这项工作，这个问题需要考虑。it is a question how he did it. 那是一个他如何做了此事的问题。注：1.一些表示“建议、命令、要求”的名词后所跟的同位语从句中，谓语动词用虚拟语气should+动词原形表示。should可省。例如：this is our only request that this (should) be settled as soon as possible. 这就是我们唯一的请求：尽快解决这个问题。 2.引导词that在同位语从句中不作句子成分；而在定语从句中必作句子成分，是从句所修饰的词的替代词。例如：the fact that the chinese people invented the compass is known to all．中国人发明指南针这个事实是众所周知的。（同位语从句） the fact that we talked about is very important．我们谈论的这个事实很重要。（定语从句）