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1、It 句型归纳总结IIt 作形式主语的句型 It + be + adj (kind , wise , careless, clever ) + of sb to do sthEg: It is wise of him to make such a decision.他做出这样的决定是明智的。 It + be + adj(easy , safe , common , normal ) + for sb to do sth该句型中adj若为important, necessary, natural, possible, strange, vital, essential等可改为从句,从句用shou
2、ld+动词原形。.Eg: Its very dangerous for children to play with fire.It is important for us to learn English well. (= It is important that we (should) learn English well.) It + be +V-ed( reported, believed, said, suggested) + that 从句 该句型中：若V-ed为reported, believed, said等常译为“据报道”，“据认为”，“据说”。若V-ed为suggested,
3、 ordered, demanded, insisted等表示“建议”,“命令”的词，从句要用虚拟语气(should)+动词原形。Eg: It is suggested that the book (should) be revised.Its said that Tom has been back from abroad.(=Tom is said to have been back from abroad.) It + be + n (a pity, a shame, a fact , good news) + that 从句: 该句型中，从句一般用(should) + 动词原形，表示出乎
4、意料，常译为竟然。 Eg: It is a pity that such a thing ( should ) happen in your class. 这种事竟然发生在你们班上，真是遗憾！ It is useless/no use/no good + doing sth此句型中的it是形式主语, 其后的动名词短语是真正的主语,译为“做没有用”。Eg : It useless arguing with him further.Its no use talking with him, because he wont listen. It takes sb. . to do sth. 该句型中i
5、t是形式主语，真正的宾语是to do sth，常译为做要花费某人。 Eg: It took thousands of people many years to build the Great Wall.IIIt 作形式宾语的句型1. sb find/ believe/ think/ feel/ consider/ make + it +n/adj +to do或从句该句型中的it 作形式宾语。为了记忆方便我们可称该句型为“6123结构”。6 指主句中常用的动词：think, believe, make, find, consider, feel；1 指的是形式宾语 it；2 指的是宾补的两种形
6、式：形容词或名词；3 指的是真正宾语的三种形式：不定式短语，动名词短语或that引导的宾语从句。Eg: We think it our duty to clean our classroom every day.He felt it important learning English well.They found it difficult that they would finish their work in two days.2. 主语hate / dislike / love / like it when从句Eg: I hate it when people speak with t
7、heir mouths full.3. 主语appreciate it if从句Eg: I really appreciate it if you could help me with my math.4. sb. depend on/count on/rely on/ see to(负责，确保) / answer for it that Eg: You may rely on it that he wont be late. You must see to it that the doors are locked before you leave the lab.5. sb. take it
8、 for granted that 认为是理所当然的 Eg: I take it for granted that he will succeed.III. It 引导的时间句型 It + is+ 时间段 + since引导的时间状语从句: 该句型中从句一般用过去时态，句意为“自从.以来已多久了”Eg : It is 5 minutes since the bus left. 公汽开走已有5分钟了 It + be + 时间段 + before引导的时间状语从句: 该句型中，主句谓语动词be若为肯定式，意为“过多久才.”；若为否定式时，意为“没过多久就.”。Eg : It will be 3 h
9、ours before he comes back.要过三个小时他才会回来It was 3 hours before he came back. 过了三个小时他才回来 It + be + 时间点 + when引导的时间状语从句 这个句型中, it 代指时间，表示时间点的词前没有介词。Eg : It will be Monday when he comes back. 他周一的时候回来. It was Monday when he came back. 他周一回来的.对比：It was on Monday that he came back . (强调句) It + is (about/high
10、) time +(that) sb did/should do sth 意为“该是某人做的时候了”， about/high是用于加强语气，that从句用should或动词一般过去时表虚拟。亦可转换成 It + is+ time +(for sb )to do sth.Eg : Its (high/about) time (that) we handed in/should hand in our homework. It / This / That +is+ the first(second ) time + that sb has done sth: 意为“这是某人第次做”，注意time前有
11、序数词，主句是 is 时 ，从句要用现在完成时；如果主句用was ，则从句须用过去完成时。Eg : It is the third time that I have seen the film. That was the second time that I have been there.IV It 引导的强调句强调句形式：It + is/was +被强调的部分+ that/who 从句 Eg: It was last week that I met an old friend in the street.It was because he was ill that he didnt com
12、e to school yesterday. (强调原因状语从句时，只能强调由because所引导的从句.)判断方法：将It is/was和that去掉，若该句是一个完整无缺的句子即为强调句.常考考点： 强调句型中的主谓一致Eg: It is you，rather than he，that are to blame for the accident 插入从句的强调句型 Eg: It was in the restaurant where we had dinner last Sunday that you left your wallet强调句型的一般疑问句、特殊疑问句形式一般疑问句：Is /
13、 Was it + 被强调部分+ that + 句子其余部分 ?Eg: Was it in 1933 that the Second World War broke out?特殊疑问句：疑问词+ be + it + that + 句子其余部分?Eg: When was it that he changed his mind to take part in the activity？强调句型用于名词性从句, 尤其注意要使用陈述语序。 Eg: I dont know when it was that he changed his mind to take part in the activity？
14、not until用于强调句型It is / was not until 被强调部分 that 其他部分Eg : It was not until midnight that she went back home.此句型只用until，不用till。但如果不是强调句型，till和until可通用。因为句型中It is / was not.已经是否定句了，that后面的从句要用肯定句。V It其他常见用法：It looks / appears as if . 看起来好像It seems that . 似乎It turns out that. 原来是It occurs to/strikes sb
15、that 突然想到It happened that . 碰巧 It doesnt matter whether/if无论是没关系It is no wonder that 难怪It all depends/that all depends.那得看情况Its up to sb.由决定，由负责，取决于as it is (1)事实上，实际情况是; (2)照原样make it成功、做到、说定Believe it or not.信不信由你How did it come about that “怎么发生的？”完成句子巩固练习：1. I was about to go to the airport when _that I had left my passport in the living room.(occur)我刚要出发去机场，这时我突然想起我把护照落在起居室了。2. You have no idea _
