教师资格证考试备考资料：英语常见句式-It 句式小结

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　　一、It作形式主语的句型

　　①It + be + adj(kind ,wise, careless, clever…)+ of sb to do sth

　　Eg:It is wise of him to make such a decision.他做出这样的决定是明智的。

　　②It + 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should+动词原形。.

　　Eg:It’s 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.)

　　③It + be +V-ed(reported,believed, said,suggested…)+ that从句

　　该句型中：⑴若V-ed为reported,believed, said等常译为“据报道”，“据认为”，“据说”。⑵若V-ed为suggested,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.

　　It’s said that Tom has been back from abroad.

　　(=Tom is said to have been back from abroad.)

　　④It + 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!

　　⑤It 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.

　　It’s no use talking with him, because he won’t listen.

　　⑥It takes sb. ... to do sth.

　　该句型中it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.

　　二、It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 their 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 forit that…

　　Eg:You may rely on it that he won’t be late.

　　You must see to it that the doors are locked before you leave the lab.

　　5.sb. take it for granted that…认为……是理所当然的

　　Eg:I take it for granted that he will succeed.

　　三、It引导的时间句型

　　⑴It + 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

　　⑵It + 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 hours 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

　　⑶It + 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)

　　⑷It + is (about/high) time +(that) sb did/should dosth

　　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 :It’s (high/about) time (that) we handed in/should hand inour homework.

　　⑸It / 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.

　　四、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 didn't come 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：

　　①强调句型中的主谓一致

　　Eg:It is you，rather than he，that are to blame for the accident.

　　②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.

　　③强调句型的一般疑问句、特殊疑问句形式

　　一般疑问句：Is / Was it +被强调部分+ that +句子其余部分?

　　Eg: Was it in 1933 that theSecond World Warbroke 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?

　　④强调句型用于名词性从句,尤其注意要使用陈述语序。

　　Eg:Idon’t know when it was that he changed his mind to take part in the activity?

　　⑤not 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。

　　五、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 occursto/strikessb that…突然想到……