“It”典型句型例释

“It”典型句型例释

“It”典型句型例释孔祥发王爱萍 11月7日

“It”句型一直是近几年NMET命题的热点，同时也是日常教与学的重点和难点。在教材和练习中频频出现，由于其繁杂多变，尤其是一些近似句型的辨析，常使同学们望而却步。笔者在平时的教学中，注意收集这样的句子，现将这些句子分类整理并作一简析，希望能对同学们的学习有所帮助。

1．①It is 3 years ________ he joined the army.

②It will be 3 years ________ we meet again.

③Tom told me that it was 3 years ________ he had left school.?

A.before

B.after?

C.since

D.when

析：①C，②A，③C。做这类题目应从时态入手。句①是一个主从复合句，该句型常是：It+is（has been）+some time+since sb.did sth.主句用一般现在时或现在完成时，而从句则用一般过去时。句②为It will be （was）+some time before sb.does（did） sth.“多久某人干…”。主句要用一般将来时或一般过去时，before引导的从句则用对应的 一般现在时或一般过去时。又如：

It wasn’t long before we met again.

不久我们又见面了。

句③与句①是同一句型，只不过该句型出现在told引导的宾语从句之中了，故用了was和 had left 的形式。?

2.①________ is well?known to us all that the earth is round.

②________ is well?known to us all,the earth is round.

A.That

B.As?

C.It

D.Which?

析：①C，②B。句①中it是形式主语，真正的主语是从句“that the earth is round ”。句②中as引导一非限制性定语从句，代替后面整句内容，置于句首。

3.①Was it the house ________ Abraham Lincoln was born?

②Was it in the house ________ Abraham Lincoln was born?

A.that

B.where

C.which

D.both A and B

析：①B，②A。句①的先行词是the house,后面为一个定语从句，所以可填where或in which。句②为强调句型。判断一个句子是否是强调句型，先把it is…that…这一结构抛开，看其余部分能否构成一个完整的句子。那么，句①还原为Abraham Lincoln was born the house.the house之前缺少介词in，故不为强调句了。句②则相符，故选that。

4.①It’s very kind ________ you to help us.

②It’s very important ________ us to keep the balance of nature.

A.for

B.of

C.to

D.with

析：①B，②A。在句①中，常见的形容词有kind,good,nice,foolish,stupid,wrong,clever 等。他们用来修饰人，表示人物的品质或性格特征。句①可变为You’re very kind to help us.所以选B。而句②则不可，因其形容词只能修饰后面的不定式，故用for。?

5.①________ no wonder that he has passed the exam.

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