备战高考：主语从句.ppt
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高中英语主语从句讲解课件(36张ppt)
+(should) +do…
*_I_t_i_s_p_o_s_s_i_b_le__th__a_t _(很可能)she will come back tomorrow. *__It_i_s_o__b_v_io_u_s__th__a_t _(很明显)this measure is effective.
3) It + be +过去分词+从句
4.The reason why I study hard is that I want to go to a
key university. 表语从句
5.They believe in that she must still be single. 6.I know nothing about him except that he is living in
找出错误，并给出理由： 1.Where shall we spend the holiday isn’t
decided. we shall 2.You have made a mistake is a fact.
That you have 3. If the policeman will come is not certain.
Beijing 7. I don’t know whether he’s free or not. 8. Mary asked whether I was doing my homework or not. 9. I’m thinking of whether we should go fishing. 10. We are worried about whether it will rain tomorrow.
killed in the accident.
*_I_t_i_s_p_o_s_s_i_b_le__th__a_t _(很可能)she will come back tomorrow. *__It_i_s_o__b_v_io_u_s__th__a_t _(很明显)this measure is effective.
3) It + be +过去分词+从句
4.The reason why I study hard is that I want to go to a
key university. 表语从句
5.They believe in that she must still be single. 6.I know nothing about him except that he is living in
找出错误，并给出理由： 1.Where shall we spend the holiday isn’t
decided. we shall 2.You have made a mistake is a fact.
That you have 3. If the policeman will come is not certain.
Beijing 7. I don’t know whether he’s free or not. 8. Mary asked whether I was doing my homework or not. 9. I’m thinking of whether we should go fishing. 10. We are worried about whether it will rain tomorrow.
killed in the accident.
人教版英语--主语从句完整ppt课件
精选
主语从句三要素
How he became a great scientist is known to us all. what you told me is true.
从句用陈述语序 谓语动词一般用单数 不能省略关联词
精选
主语从句的注意问题
• 1.一个句子作主语时，主句的谓语动词应为 单数。
衡, 避免 “头重脚轻”, 常用 it 作形式主语, 而
把从句放在后面。 例如:
1. That he will refuse this piece of advice is impossible. __I_t _is__im__p_o_s_s_i_b_le__th_a_t_h__e_w_i_ll_r_e_f_u_s_e_t_h_i_s_p_i_e_c_e __o_f_a_d_v_i_c_e_._____________________________
It is a pity/shame that... 遗憾的是…… It is a surprise that…令人惊奇的是… It is a fact that… …是事实 It is common knowledge that… …是常识
*__It_i_s_a__p_i_ty__th_a_t__(很遗憾)we lost the match.
(4) What is needed for the program is more wisdom.
译为：这__个__项__目__所__需__要__的__是__更___多__的__智__慧__。
精选
从上面例句可以看出，that引导主语从句时，在句中具 有“两不”原则：
一、不作句子成分； 二、没有实际意义。 当它引导的主语从句置于句首时，that不能省略； 如果用it作形式主语，而把主语从句放在句末时，that 可以省略。
主语从句三要素
How he became a great scientist is known to us all. what you told me is true.
从句用陈述语序 谓语动词一般用单数 不能省略关联词
精选
主语从句的注意问题
• 1.一个句子作主语时，主句的谓语动词应为 单数。
衡, 避免 “头重脚轻”, 常用 it 作形式主语, 而
把从句放在后面。 例如:
1. That he will refuse this piece of advice is impossible. __I_t _is__im__p_o_s_s_i_b_le__th_a_t_h__e_w_i_ll_r_e_f_u_s_e_t_h_i_s_p_i_e_c_e __o_f_a_d_v_i_c_e_._____________________________
It is a pity/shame that... 遗憾的是…… It is a surprise that…令人惊奇的是… It is a fact that… …是事实 It is common knowledge that… …是常识
*__It_i_s_a__p_i_ty__th_a_t__(很遗憾)we lost the match.
(4) What is needed for the program is more wisdom.
译为：这__个__项__目__所__需__要__的__是__更___多__的__智__慧__。
精选
从上面例句可以看出，that引导主语从句时，在句中具 有“两不”原则：
一、不作句子成分； 二、没有实际意义。 当它引导的主语从句置于句首时，that不能省略； 如果用it作形式主语，而把主语从句放在句末时，that 可以省略。
英语主语从句讲解 ppt课件
主语从 句不能 将if 放 句首
ppt课件 4
what 与that 在引导主语从句时区别
1) What you said yesterday is right.
It is right what you said yesterday. ×
what 充当句子成分，如主语、宾语、表语，
2) That she is still alive is certain.
ppt课件
14
1.I hate ____ when people talk with their mouths full A. it B. that C. these D. them 2. I feel ____ strange that he should be so careless. A. / B. it C. that D. how
ppt课件 17
Exercises
B another power station 1. The news ____ will be built cheered all the villagers. A which B that C what D whatever
A he told us is exciting. 2 The news ____
ppt课件
16
Practice
1. His proposal that we go there on foot is acceptable. 2. Many teachers hold the view that teenagers should not spend too much time online. 3.The first request that he made was to ask for freedom. 4. Do you have any idea where we will be sent? 5. Is this the company where your father works? 6. This is the reason that he gave for his absence. 7. He made an excuse that his car broke down on the way.
ppt课件 4
what 与that 在引导主语从句时区别
1) What you said yesterday is right.
It is right what you said yesterday. ×
what 充当句子成分，如主语、宾语、表语，
2) That she is still alive is certain.
ppt课件
14
1.I hate ____ when people talk with their mouths full A. it B. that C. these D. them 2. I feel ____ strange that he should be so careless. A. / B. it C. that D. how
ppt课件 17
Exercises
B another power station 1. The news ____ will be built cheered all the villagers. A which B that C what D whatever
A he told us is exciting. 2 The news ____
ppt课件
16
Practice
1. His proposal that we go there on foot is acceptable. 2. Many teachers hold the view that teenagers should not spend too much time online. 3.The first request that he made was to ask for freedom. 4. Do you have any idea where we will be sent? 5. Is this the company where your father works? 6. This is the reason that he gave for his absence. 7. He made an excuse that his car broke down on the way.
主语从句公开课PPT课件
主语从句可以包含丰富的信息， 包括时间、地点、条件、原因等
，使表达更加准确具体。
通过主语从句可以精确地描述某 个事件或情况，避免歧义和误解
。
主语从句还可以用来表达复杂的 观点和态度，使文章更具深度和
说服力。
增加文采和感染力
主语从句可以采用多种句式和表达方 式，如倒装句、强调句等，增加文章 的文采和感染力。
连接代词和连接副词引导的主语从句一般放在句首，谓语动词用单数形式。
连接代词what和which在引导主语从句时，有时可以互换使用，但which更强调选 择范围。
主语从句时态、语态和语气
03
问题
时态问题
主语从句时态与主句时态一致
01
主语从句中的动词时态通常与主句中的动词时态保持一致，表
示同时发生的动作或状态。
当主语从句中的主语是表示数量的短语（如a number of, the majority of等）时，谓 语动词的单复数形式取决于短语所修饰的名词。
主语从句中的主语是并列结构时，谓语动词用复数形式
当主语从句中的主语是由and连接的并列结构时，谓语动词用复数形式。
练习题讲解
选择题
通过选择题的形式， 让学生判断主语从句 中主谓一致问题的正
当主语从句中的主语是复数形式时，谓语动词必须与主语保持一致，也用复数形式。
特殊情况处理方法
主语从句中的主语是不定代词时，谓语动词用单数形式
当主语从句中的主语是不定代词（如something, nothing, anyone等）时，谓语动词 用单数形式。
主语从句中的主语是表示数量的短语时，谓语动词用单数或…
主语从句与形式主语的区分
形式主语it代替真正的主语从句，使句子结构更加平衡。需注意形 式主语与真正主语的区分。
高考英语语法-名词性从句之主语从句PPT
2.Why he committed crimes suprised all of us ________________________________________
3.H___o_w____t_h__e___a__n__c__ie__n__t___E__g_y__p__t_i_a__n___b__u__i_l_t__t__h__e___P__y_r__a__m__i_d_ remains a secret.
Attention
when the adjective is advisable（可取的）, desirable（令人满意的）, essential, important,
vital, natural, necessary, probable, possible, strange etc. we use “ should+v.” in the subjective clause.
望，他一刻不停地关注着天下形势，思考着安定天下济苍生一逞抱负的路径。你想，一个小小的“弼马温”，怎么对晋国的历史、对
2.There is essential that these application forms 晋国国君的为人那么清楚，对秦伯的心理、对秦晋之间的恩怨又是如此了然。“老骥伏枥，志在千里”的豪情无疑是后人敬仰他们的
亲《，东化 周为列狼国与志豺》_”里_，说_从他__而“_表须_达发了尽对白国，事佝的偻忧其虑身与，关踌切躇。其步，”以至到了朝堂之上，“左右莫不_含_笑__”_。__
明确：一定要不断挖掘和重视人才，不要等到危机出现后再重用人才。
what that （3）初步了解故事情节，特别注意对烛之武这个中心人物的把握。 people was very friendly. 烛之武也是如此。尽管怀才不遇，但他没有放弃自己的希望。烛之武不是不想做一番事业，他的心始终没有放弃过“一飞冲天”的渴
3.H___o_w____t_h__e___a__n__c__ie__n__t___E__g_y__p__t_i_a__n___b__u__i_l_t__t__h__e___P__y_r__a__m__i_d_ remains a secret.
Attention
when the adjective is advisable（可取的）, desirable（令人满意的）, essential, important,
vital, natural, necessary, probable, possible, strange etc. we use “ should+v.” in the subjective clause.
望，他一刻不停地关注着天下形势，思考着安定天下济苍生一逞抱负的路径。你想，一个小小的“弼马温”，怎么对晋国的历史、对
2.There is essential that these application forms 晋国国君的为人那么清楚，对秦伯的心理、对秦晋之间的恩怨又是如此了然。“老骥伏枥，志在千里”的豪情无疑是后人敬仰他们的
亲《，东化 周为列狼国与志豺》_”里_，说_从他__而“_表须_达发了尽对白国，事佝的偻忧其虑身与，关踌切躇。其步，”以至到了朝堂之上，“左右莫不_含_笑__”_。__
明确：一定要不断挖掘和重视人才，不要等到危机出现后再重用人才。
what that （3）初步了解故事情节，特别注意对烛之武这个中心人物的把握。 people was very friendly. 烛之武也是如此。尽管怀才不遇，但他没有放弃自己的希望。烛之武不是不想做一番事业，他的心始终没有放弃过“一飞冲天”的渴
2025届新高三一轮复习主语从句讲解及练习课件
it 作形式主语
1. It+be+adj+that eg: It is certain that you will have homework but it is uncertain who will have the double homework.
2. It+be+名词词组 (no wonder, an honour, a pity)+that eg: It’s a pity that I haven’t seen he dance.
3. The major that I chose belongs to the group that people
call noble majors.
定语从句
宾语从句
4. My university lies in what people call College Town.
5. The news excites me that there will be many other new
TV series in November.
同位语从句
主从句判断技巧归纳及复习
1. 从句起点： 引导词 引导词省略时，从第二个主语开始
2. 从句终点： 二谓 末尾标点
主语从句 ---A Journey to Xi’an
1. That I booked a beautiful hotel online delighted me .
主语从句的讲解和运用
A Present for You
---A Tቤተ መጻሕፍቲ ባይዱst
Requirment：1. 判断什么从句
2. 判断主从句
Basic Information
主语从句公开课PPT
添加 标题
主语从句可充当句子的主语。
添加 标题
主语从句的语序：为了避免头重脚轻，通常把形式主语it放在句首位置，真正主语放在句末。
添加 标题
主语从句在句中起名词性作用，是一个完整的句子，表达完整的意思，引导主语从句的词语除that、 whether以及疑问词外，连词if、whether和关系代词who、whom、whose、what、which等在主语从句中 不充当任何成分。
主语从句与形式 主语it的区别
主语从句的时态问题
主语从句的时态要与主句保持 一致
主句是现在时，从句可以用任 何时态
主句是过去时，成时，从句要用 过去的相应时态
主语从句的练习与解析
主语从句的专项练习
判断题：分析句 子结构，判断是 否为主语从句
改错题：找出句 子中的错误并进 行修改
副词性从句
写作中主语从句 的作用：使文章 更加生动、具体， 丰富文章的内容， 避免冗长和复杂
句式
写作中使用主语 从句的注意事项： 主语从句的连接 词选择要恰当， 主语从句的时态 要正确，主语从 句的主谓要一致。
总结与展望
主语从句的重要性和应用价值
掌握主语从句的引导词
理解主语从句的时态和语序
理解主语从句的定义和构成
YOUR LOGO
主语从句公开课 PPT
WPS,a click to unlimited possibilities
汇报人：WPS
汇报时间：20X-XX-XX
主语从句简介
主语从句的常见 问题
主语从句的基本 形式
主语从句的练习 与解析
主语从句的用法 总结与展望
主语从句简介
什么是主语从句
分类：根据引导词的不同， 主语从句可分为三类
主语从句讲解+课件-2025届高三英语上学期一轮复习专项
Thanks
随堂练习：用适当的连接词填空 6._W___h_a_t____ worries us most is that the number of the kids dominated by
computers is growing fast.
7._W___h_e_t_h_e__r_one can turn his dream into a reality depends on his talent and the
有时为了避免头重脚轻，常用it作形式主语，真正的主语放后面。
①It + be + 形容词（clear /unfair等）+ that ...
It's strange that he didn't come yesterday. ②It + be + 名词词组（a fact /a pity /a shame等）+ that ... It is a question that who will hold the meeting. ③It + be + 过去分词（announced /believed /expected等）+ that ... It is said that there was a terrible plane crash this morning. ④It + seems /appears /happens等+ that ... It seems that he is a good guy.
主语从句
Who will win the match is still unknown.
谁会赢得这场比赛，目前还不清楚。
在复合句中，作主语的句子称为主语 从句，通常位于谓语动词之前
主语从句超全ppt课件
第二讲：主语从句的引导词及各 类主语从句
主语从句在复合句中作句子的主语。 引导主语从句的词有从属连词that, whether, if；连接代词who, whoever, whom, what, whatever, whose, which； 连接副词when, where, how, why等。
surprise/no wonder难怪/good news/a good thing/a question /that… …是事实
It is common knowledge that… …是常识
*_It__is__a__p_it_y__th__a_t_(很遗憾)we lost the match.
句子
简单句 复合句
并列句
形容词性从句 名词性从句 副词性从句
定语从句
主语从句 subject clause
宾语从句 object clause
表语从句 predicative clause
同位语从句 appositive clause
比较状语从句 地点状语从句 时间状语从句 让步状语从句 条件状语从句 目的状语从句 方式状语从句 结果状语从句 原因状语从句
*____I_t _is_r_e_p_o_rt_ed__th_a_t_(据报道)20 people were killed in the accident.
*___It_i_s_s_u_g_g_es_t_e_d_th_a_t__(建议)we should eat more vegetable and do more exercise.
特殊疑问句作主语
• 需要先将疑问句的倒装语序变成陈述句语 序。
Why dinosaurs became extinct is still a mystery.
高考英语名词性从句之主语从句精讲(含例题) 课件36张PPT
总结：连接代词引导主语从句的用法
连接代词
1. 作用：连接主句和从句，在从句中充当主语、宾语、表语、定语
2. 分类: 充当主、宾、表：what(ever), who(ever), whom(ever)
充当定语：which(ever), whose
3. 与连接词对比
对比 相同点
连接词
连接代词
都起连接主从句的作用
地点状语：where, wherever 方式状语：how, 原 因 状 语 ： w h y,
时间类关系副词：when, whenever
when 指...的时间，在从句中做时间状语
When the speech contest will be held still needs to be discussed. 演讲比赛举办的时间还需要再讨论。 Whenever you want to come is fine with me. 无论什么时候你想来我都可以。
s方uc式ce状ed语is：cheortwain . frightened her.
在句中充当状语 Why the sun rises in the east is interesting.
原因状语：why
思考：如何选择主语从句连接词？
1. 找到从句标出来 2. 判断从句何类型 3. 判断是否缺成分 4. 判断用何连接词
whether / if 引导主语从句的区别
相同点 1. 都表示“是否” 2. 在从句中没有充当成分 3. 起连接作用 4. 可用it做形式主语，从句放句尾
区别
1. whether引导的主语从句可以放在句首 Whether the plan will be carried out is still unknown.
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_W__h_o_e_v_e_r breaks the law should be punished. _W__h_o_e_v_e_r has helped to save the drowning girl is worth praising. _W__h_o_e_v_e_r tells lies is wrong．
B: Which of them won the gold medal __is__ __a___ _m_y_s_t_e_r_y_ to me.
4. A: He hasn’t told us the reason for his being late again.
B: _W__h_y__ _h_e___ _w__a_s__ _la_t_e__ _a_g_a_in_ has not been told.
2. A: When the plane is to take off has not been announced.
B: __It__ _h_a_s_ _n_o_t_ b_e_e_n__a_n_n_o_u_n_c_e_d_ when the plane is to take off.
3. A: It is a mystery to me which of them won the gold medal.
考 察
带有形式主语it 的主语从句 与强调句型的区别
难
点
• 如何判断是强调句型还是主语从句？
总结：
将（It is /was) ----( that/who)----括号里的词 同时去掉，看剩下的部分是否仍然成立。 若成立，则是强调句型；若不成立，则是
主语从句。
• 【2012全国】24. It is by no means clear ____
• 2. When will the work be finished is unknown. × When the work will be finished is unknown. √
• 3. What will he do after graduation is a question×. What he will do after graduation is a question.√
• 填空练习：
• 1)W_h_e_r_e_____ the meeting will be held next week hasn’t been decided yet.
• 2)W__h_e_n_____ the plan will be carried out is still unknown.
高考考点
1.考察重点：连接词的恰当选用 2.考察难点：带有形式主语it 的主语 从句与强调句型的区别
一主语从句的连接词
1. that 只起引导作用，本身无实际意义，不充 当任何成分，但不能省略。 That she left him made him heart-broken. That he is still alive is a good news to us.
-- It’s known to all that the earth is round. 2. That you missed the chance is a pity.
-- It is a pity that you missed the chance.
用it形式主语的that从句有以下四种 不同的搭配：
• 5)W_h_a_t______ we need is more time.
• 6)W_h_e_t_h_e_r___ we can arrive at the airport before 8 o’clock is still a question.
• 1. Where will the meeting be held is not decided.× Where the meeting will be held is not decided. √
It is a fact that……
事实是……
It + 不及物动词 ＋ that从句
Hale Waihona Puke It appears that…
似乎…
It happens that ….
碰巧…
It occurred to me that…… 我突然想起……
1. A: That light travels in straight lines is known to all. B: _It_’_s_ _k_n_o_w_n___to__ __a_l_l __ that light travels in straight lines.
结论2： 主语从句应使用陈述句语序
注： what 与 that在引导主语从句时的区别
what 在从句中充当句子成分，如主语、宾语、表 语，而that 则不然。 1)_W__h_a_t you said yesterday is right. 2)_T_h__a_t she is still alive is a consolation（安慰）. 3)_T_h__a_t he lost the bike worried him a lot.
B are fixed at birth, but ___________ he reaches these
limits will depend on his environment. A. where B. whether C. that D. why 2011年江苏卷第26题
A It was never clear _______ the man hadn’t reported
2.You have made a mistake is a fact. That you have
1.What you left are only several old books.
2.What you said is of great importance.
3.Whether he’ll come here is not clear.
一：改错练习
1.Where shall we spend the holiday isn’t decided. we shall
the president can do to end the strike.
• A. how
B. which
• C. that
D. what
[解析] D 考查名词性从句。句中的it是形式主语，
“____ the president can do to end the strike”
是真正的主语，这里缺少do的宾语，故用连接代词 what。
√
3. If he will hand in his homework is a questions. × Whether he will hand in his homework is a questions. √
结论1：
在主语从句中只能用whether,不能用if
考 察
Attention!!!
2.置于句首只能用whether “是否”，不充当从句 的任何成分。
他是否会参加这个话剧表演是显而易见的
__W__h_e_th_e_r_h_e_’_l_l _ta_k_e_p_a_r_t_i_n_t_h_e_p_l_ay__ is clear. _W_h_e_t_h_e_r _h_e_c_a_n_b_u_y__t_h_e _p_la_n_e__ti_c_k_e_ts_(他能否买到飞机票) doesn’t matter much.
连接词的恰当选用
重
点
3 wh-疑问词包含意思，并在从句中充当成分。
W__h_e_n_ she will be back is still a question. _W_h_a_t_ you told me just now was really a surprise. W__h_e_r_e we will hold the basketball game tomorrow is not important. W__h_i_ch_ class will win the football game is not clear. _W__h_o_ will meet him is not decided.
1. If she will come is not important. ×
Whether she will come is not important.√
2. If she will have enough time is a question. ×
Whether she will have enough time is a question
It + be + 形容词 ＋ that从句
It is necessary that… It is important that …. It is obvious that……
有必要… 重要的是… 很明显……
It + be + -ed分词 ＋ that从句
It is believed that…
人们相信…
• 3)W__h_e_n_____ the building of the car factory will be started hasn’t been decided yet.
• 4)W_h_i_c_h_____ team will win the match is still unknown.
4)_W__h_a_t caused the accident remains unknown. 5) W__h_a__t made matters worse was_th__a_t night began to fall.
6) _W__h_a_t we can’t get seems better than _w_h_a_t__ we have.
B: Which of them won the gold medal __is__ __a___ _m_y_s_t_e_r_y_ to me.
4. A: He hasn’t told us the reason for his being late again.
B: _W__h_y__ _h_e___ _w__a_s__ _la_t_e__ _a_g_a_in_ has not been told.
2. A: When the plane is to take off has not been announced.
B: __It__ _h_a_s_ _n_o_t_ b_e_e_n__a_n_n_o_u_n_c_e_d_ when the plane is to take off.
3. A: It is a mystery to me which of them won the gold medal.
考 察
带有形式主语it 的主语从句 与强调句型的区别
难
点
• 如何判断是强调句型还是主语从句？
总结：
将（It is /was) ----( that/who)----括号里的词 同时去掉，看剩下的部分是否仍然成立。 若成立，则是强调句型；若不成立，则是
主语从句。
• 【2012全国】24. It is by no means clear ____
• 2. When will the work be finished is unknown. × When the work will be finished is unknown. √
• 3. What will he do after graduation is a question×. What he will do after graduation is a question.√
• 填空练习：
• 1)W_h_e_r_e_____ the meeting will be held next week hasn’t been decided yet.
• 2)W__h_e_n_____ the plan will be carried out is still unknown.
高考考点
1.考察重点：连接词的恰当选用 2.考察难点：带有形式主语it 的主语 从句与强调句型的区别
一主语从句的连接词
1. that 只起引导作用，本身无实际意义，不充 当任何成分，但不能省略。 That she left him made him heart-broken. That he is still alive is a good news to us.
-- It’s known to all that the earth is round. 2. That you missed the chance is a pity.
-- It is a pity that you missed the chance.
用it形式主语的that从句有以下四种 不同的搭配：
• 5)W_h_a_t______ we need is more time.
• 6)W_h_e_t_h_e_r___ we can arrive at the airport before 8 o’clock is still a question.
• 1. Where will the meeting be held is not decided.× Where the meeting will be held is not decided. √
It is a fact that……
事实是……
It + 不及物动词 ＋ that从句
Hale Waihona Puke It appears that…
似乎…
It happens that ….
碰巧…
It occurred to me that…… 我突然想起……
1. A: That light travels in straight lines is known to all. B: _It_’_s_ _k_n_o_w_n___to__ __a_l_l __ that light travels in straight lines.
结论2： 主语从句应使用陈述句语序
注： what 与 that在引导主语从句时的区别
what 在从句中充当句子成分，如主语、宾语、表 语，而that 则不然。 1)_W__h_a_t you said yesterday is right. 2)_T_h__a_t she is still alive is a consolation（安慰）. 3)_T_h__a_t he lost the bike worried him a lot.
B are fixed at birth, but ___________ he reaches these
limits will depend on his environment. A. where B. whether C. that D. why 2011年江苏卷第26题
A It was never clear _______ the man hadn’t reported
2.You have made a mistake is a fact. That you have
1.What you left are only several old books.
2.What you said is of great importance.
3.Whether he’ll come here is not clear.
一：改错练习
1.Where shall we spend the holiday isn’t decided. we shall
the president can do to end the strike.
• A. how
B. which
• C. that
D. what
[解析] D 考查名词性从句。句中的it是形式主语，
“____ the president can do to end the strike”
是真正的主语，这里缺少do的宾语，故用连接代词 what。
√
3. If he will hand in his homework is a questions. × Whether he will hand in his homework is a questions. √
结论1：
在主语从句中只能用whether,不能用if
考 察
Attention!!!
2.置于句首只能用whether “是否”，不充当从句 的任何成分。
他是否会参加这个话剧表演是显而易见的
__W__h_e_th_e_r_h_e_’_l_l _ta_k_e_p_a_r_t_i_n_t_h_e_p_l_ay__ is clear. _W_h_e_t_h_e_r _h_e_c_a_n_b_u_y__t_h_e _p_la_n_e__ti_c_k_e_ts_(他能否买到飞机票) doesn’t matter much.
连接词的恰当选用
重
点
3 wh-疑问词包含意思，并在从句中充当成分。
W__h_e_n_ she will be back is still a question. _W_h_a_t_ you told me just now was really a surprise. W__h_e_r_e we will hold the basketball game tomorrow is not important. W__h_i_ch_ class will win the football game is not clear. _W__h_o_ will meet him is not decided.
1. If she will come is not important. ×
Whether she will come is not important.√
2. If she will have enough time is a question. ×
Whether she will have enough time is a question
It + be + 形容词 ＋ that从句
It is necessary that… It is important that …. It is obvious that……
有必要… 重要的是… 很明显……
It + be + -ed分词 ＋ that从句
It is believed that…
人们相信…
• 3)W__h_e_n_____ the building of the car factory will be started hasn’t been decided yet.
• 4)W_h_i_c_h_____ team will win the match is still unknown.
4)_W__h_a_t caused the accident remains unknown. 5) W__h_a__t made matters worse was_th__a_t night began to fall.
6) _W__h_a_t we can’t get seems better than _w_h_a_t__ we have.