it做形式主语.ppt
it作形式主语和形式宾语
2. It is no good/use/harm doing sth. It is no use making any complaints about it. It is no good talking to him.
不定式；动名词；that从句作真正的主语。
3. It seems/ appears +adj./n + to do that 从句 It seems wise for us not to expect too much of him. It appears all right to tell him everything about it. It seems true that he will take the place of Mr. Li. 4. It seems / appears (to sb.) that… It seems to me that he doesn’t know anything about it.
8. 他竟然那样举止不当, 似乎很奇怪. It seemed strange that he should have behaved like that. 9. 那天晚上他恰巧在那里. It happened that he was there that evening. 10. 谁赢得这次竞选和我关系不大. It’ll make no differection. 11. 他是否来都没关系. It doesn’t matter whether he will come or not.
5. It happened that It happened that I had no money on me. 6. It makes no difference / doesn’t matter to sb. + wh-从句 It won’t make much difference to me which side may win or lose. It doesn’t matter to him whether you will put off the meeting. 7. It is said/reported/ believed that…
英语语法it形式主语和形式宾语ppt课件
1 it 代替不定式（短语） 当不定式（短语）在复合宾语结构中作某些动词（如think, make, find,
consider, feel, suppose等）的宾语时。
I find it pleasant to work with him. They felt it my honor to be invited to speak here.
It
6.(改错)That felt funny watching myself on TV.
It
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Summary
it
①It is+adj for/of sb+to do sth
作 代替不定式 ②It is+n+to do sth
为
③It takes/took sb+sth+to do sth
形
代替动名词 It is+no use/good/useless/pleasure/a wa
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？ It is frightening to go climbing with him. to go climbing with him 是真正的主语
To go climbing with him is frightening.
通常it作为形式主语，在句中没有实 际意义，只是满足语法需要，起到 一个平衡句子结构，避免句子头重 脚轻的作用。
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• ⑥ It + takes + (sb.) + some time + to do sth. •这是一个表示“（某人）花多少时间干某事”的 句型，其中it是形式主语，代替后面的不定式 （to do sth.），句型中的sb.也可以省略。
It 的 用法(共16张PPT)
Not until I graduated from the university did I see him.
robbed me of near the school last Don’t take it for granted
It was near the school that the man in black robbed me of my mobile phone last year because of my carelessness.
children in poor areas have access Don’t take it for granted
the school last year because of my carelessness.
Who was it that robbed me of my mobile phone near the school last year because of my carelessness.
强调句的特殊疑问句
school because of my carelessness.
When was it that the man in black robbed me of my mobile phone near the school because of my carelessness.
强调句的特殊疑问句
学校规定，考试中作弊的学生将受到严惩。 The school makes it a rule that those
who cheat in the exams will be seriously punished.
it作形式主语与形式宾语
it作形式主语与形式宾语it作形式主语与形式宾语形式主语形式主语是动词不定式的一种，它也是逻辑主语, 可以把它归类到逻辑主语的第一种（不定式的逻辑主语）。
用作宾语的不定式，用作目的状语的不定式，用作结果状语的不定式都是属于不定式的大概念里面的。
详细用法综述形式主语it作为形式主语的it并无实际语义，只是为满足语法上的需要，避免句子头重脚轻，它代替的是句子的逻辑主语，概括起来会有如下情况：? 句子的逻辑主语为不定式如：It is very kind of you to give me a hand in time. It is my pleasure to address the meeting.It was pretty hard for him to bring up the child on his own.? 句子的逻辑主语为从句如：It so happened that the tickets were sold out.It is extremely obvious that she has been lying about her identity.It suddenly occurred to me that the message must have been hidden between the layers of the briefcase.? 句子的逻辑主语为动名词短语这类句子远不如前面两种出现率高，主要在（no good, waste, useless, no use, dangerous）等词语的后面用。
如：It is no use reasoning with him. It is no good reading in dim light.作形式主语的代词只能用it，不能用that、this等词。
例如:1）It is easier to lose friends than to make friends. 交朋友难而失去朋友比较容易。
it作形式主语和形式宾语
I think it difficult to learn written Chinese．
5. It happened that
It happened that I had no money on me.
6. It makes no difference / doesn’t matter to sb. + wh-从句
It won’t make much difference to me which side may win or lose.
It is a pity that he is not able to join us.
2. It is no good/use/harm doing sth. It is no use making any complaints about it. It is no good talking to him.
It 作形式主语 1)It is +adj./ n. + (for / of sb.) to do sth.
that 从句 It is wrong of you to say anything like that in
that occasion. It is easy for him to lose temper.
I consider it a shame that we have lost the game.
用以上2个句型造句. 1.我认为他几乎每晚都出去散步是很奇怪的.
it做形式主语PPT课件
.1 代替主语从句
1）It is + adj. +that从句
① It is clear ( obvious， true， possible certain....) that ..... “清楚（显然，真的，肯定．．．）”
It is very clear that he’s round and tall like a tree.
It seems that he will be back in a few days. 看 来．．．
.
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6). It doesn’t matter whether ( if ) ...
该句型中whether(if) 引导的从句是真正主语， 该句型常译为＂不论（是否）．．．没关 系．．．。
It doesn’t matter if they are old.
.
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. We are counting on it that you will come.
该句型中的it是一个形式宾语，表示模糊意 思或代替后面that 引导的宾语从句。 因为在这个句型中的谓语动词都是需要跟宾 语的，但又不能直接跟从句作宾语，于是就 得在从句前加上一个形式宾语it。
常见的短语和动词有：count on (依靠， 指望，期盼), see to(负责), depend on (依 靠), rely on(信赖，依靠)等。
It is kind of you to say so.
= You are kind to say so.
3). It is necessary ( for sb. ) to do sth.
常见的形容词有：① important， necessary， natural ② easy ，
it做形式主语
it做形式主语形式主语指的是在动名词或者名词性从句做主语时，为了避免主语太长而导致整个句子头重脚轻的情况而用在句首的it，真正的主语（即动名词或名词性从句）则放至句末。
这样就能够保证整个句子形式上的美感。
动名词做主语时it做形式主语动名词to do和doing做主语时it做形式主语主要有以下几种常见句式：(1) it + be + noun + (for sb) to do sth能够满足这个句式的常见名词有：idea, pity, pleasure等。
例句1：It's a hard work for the traffic police to direct traffic in such a hot weather.在如此炎热的天气指挥交通对于交警来说十分艰难。
例句2：It's a good idea to go for an outing in Spring.在春天出去郊游是个好主意。
例句3：It's a pity to miss the biggest automobile exhibition.错过那次最大的车展真遗憾。
(2) it + be + adj + (for sb) to do sth能够满足这个句式的常见形容词有：easy, hard, difficult, necessary, important, possible 等。
例句1：It's necessary to be punctual. 守时很有必要。
例句2：It's difficult for a little kid to totally understand your words.让一个小孩完全理解你的话很难。
例句3：It's common for leaves to fall from the tree in autumn.秋天树叶飘落是普遍现象。
(3) it + be + no good/use/sence.... + doing sth例句1：It's no use complaining about your terrible surroundings.抱怨你周边的恶劣环境是没有用的。
it作形式主语与形式宾语
ｉt作形式主语与形式宾语形式主语形式主语就是动词不定式得一种,它也就是逻辑主语, 可以把它归类到逻辑主语得第一种(不定式得逻辑主语)。
用作宾语得不定式,用作目得状语得不定式,用作结果状语得不定式都就是属于不定式得大概念里面得。
详细用法综述形式主语it作为形式主语得iｔ并无实际语义,只就是为满足语法上得需要,避免句子头重脚轻,它代替得就是句子得逻辑主语,概括起来会有如下情况:➢句子得逻辑主语为不定式如:Iｔｉs ｖｅry kind oｆyoｕtｏgiveｍｅａｈａｎd in tｉme。
It isｍy ｐleasuｒｅｔo aｄdｒｅssｔhe ｍeeｔinｇ、Itｗas pretty hａrd for hｉm to brｉng up the chｉlｄon ｈiｓown、➢句子得逻辑主语为从句如:It sｏhappｅned ｔhatｔhｅticｋets weｒe sold out、It iｓextｒeｍely obvｉoｕs that she haｓbeeｎｌying aｂout heｒｉｄentiｔy。
It sｕdｄeｎly occｕrｒｅｄｔo me thatｔhe mesｓageｍust have beｅn hidｄｅn ｂｅtween tｈe layｅrs oｆｔｈe briefcase.➢句子得逻辑主语为动名词短语这类句子远不如前面两种出现率高,主要在(no good, waste, uｓeless, no ｕsｅ,dange ｒoｕｓ)等词语得后面用。
如:It is no use reasonｉnｇｗith him。
Ｉt iｓno goｏd ｒeaｄinｇiｎdiｍlｉght。
作形式主语得代词只能用ｉt,不能用thaｔ、ｔhis等词。
例如:1)It iｓeasiｅr to loｓe friｅnds tｈａｎtｏmａkｅfriends。
交朋友难而失去朋友比较容易、2)It iｓｉmportant for moｄern youｎg ｐeoplｅto masteｒat ｌeast twｏｆoreign laｎguａgeｓ。
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主句中的过去分词是表示请求，建议，命令等词时， that 后的从句要用虚拟语气（should + 动词原形）， should 可以省；常译为“据建议；有命令．．．）
. it 用作形式主语
.1 代替主语从句
1）It is + adj. +that从句
① It is clear ( obvious， true， possible certain....) that ..... “清楚（显然，真的，肯定．．．）”
It is very clear that he’s round and tall like a tree.
2）.It is +v-ed +that 从句 ① It is said (reported， learned....) that ...
据说（据报道，据悉．．．）“。 It is said that he has come to Beijing.
= He is said to have come to Beijing.
5). It happens (seems， looks， appeБайду номын сангаасrs ) that... 该句型中it是形式主语，that 引导的是主语从句，主
句中的happen ， seem等词是不及物动词。
It happened ( so happened ) that he met his teacher in the street. 碰巧．．.
3). It is necessary ( for sb. ) to do sth. 常见的形容词有：① important， necessary， natural ② easy ， safe ，common ，normal ，hard ， difficult ,dangerous ， 等。 在①中的形容词作表语可以用从句改写， 如： It is important for her to come to the party. = It is important that she (should ) come to the party.
It is suggested that the meeting ( should ) be put off.
3）. It is a pity ( a shame ... ) that ... that后的从句一般用虚拟语气（should + 动词原形），
should可省去．表示出乎意料，常译为“竟然”。没有 这种意义时，则不用虚拟语气。
是常用过去时态表示虚拟．常译为“是（正是）．．．的 时侯．．．”
It is time that children went to bed.
② It is the first ( second ... ) time that ... “是第一（二）．．．次．．．”。
It is the first time I have been here. = This is the first time I have been here.
.3.作形式主语替代ing形式
It is no good (use ) doing sth. 该句型中的真正主语是动名词短语，主句中的表 语可以是no good , no use ,useless
It is no good learning English without writing English.
②. It is important ( necessary， right， strange， natural...) that ... that 后的从句中要用虚拟语气（should + 动词原形）， should 可以省去，建议记住该句型中的形容词。 It is important that we (should) learn English well.
It seems that he will be back in a few days. 看 来．．．
6). It doesn’t matter whether ( if ) ...
该句型中whether(if) 引导的从句是真正主语， 该句型常译为＂不论（是否）．．．没关 系．．．。
It doesn’t matter if they are old.
.2.作形式主语替代不定式
1). It takes sb. ... to do sth. ＂做．．．要花费某人．．＂ It took thousands of people many years to build the Great Wall.
2). It is kind ( of sb. ) to do sth. 主句中的形容词必须是能表示逻辑主语特征的形容词。 常见的有： bad ， brave ， careless， clever ， cruel ， foolish ，stupid ， wise wrong等。 这个句型可以改写为：sb. is kind to do sth. 。 It is kind of you to say so. = You are kind to say so.
It's useless trying to argue with Shylock.
. It looks ( seems ) as if ...
常译为，“看起来好象．．．” 如果与事实不相符合，则用虚拟语气．
It looks as if he is ill.（真的病了） It looks as if he were ill. （没有生病） It seemed as if he were dying.
It is a pity that such a thing ( should ) happen in your class.
It is a pity that he is ill.
4).① It is time ( about time ，high time ) that ... 该句型中that 后的从句应该用虚拟语气，值得注意的