It句型比较与掌握

1.It is the first/second...time+that 从句。该句型表示“这是谁第几次做……”主句谓语是is,从句用现在完成时；若主句谓语是was,从句用过去完成时。It可换为This，That，还可省略。例如：

It is the first time that I have read an English novel.

That was the second time that he had gone abroad.

2.It is +一段时间+since 从句。这个句型的意思是“某人做……已多久了”。例如：

It is two years since his family moved to America.

注意：从句的动词必须是短暂性动词。如果是延续性动词，意思就变为“不做……已多久了”。 看下面的对话：

—Can I speak to Mr.Wang?

—Sorry,it is one year since he worked here.

第二句话要翻译成：对不起，他不在这儿工作已一年了。

3.It will be +一段时间+before 从句。这个句型表示“要过多久才做某事”。例如：

It will be three months before we see each other again.

4.It is/was +强调部分+that/who+其他成分。这是强调句型，可强调人、时间、地点，甚至句子。 强调人时连词可用that或who,其他情况都只用that。看下面句子：

John Bell invented the telephone in 1873.

我们可以这样强调主语、宾语和时间状语。

It was John Bell that/who invented the telephone in 1873.

It was the telephone that John Bell invented in 1873.

It was in 1873 that John Bell invented the telephone.

如果再向句子的黑体字部分提问，他们就变成：

Who was it that invented the telephone in 1873?

What was it that John Bell invented in 1873?

When was it that John Bell invented the telephone？

由此我们可以概括出强调句的特殊问句句型：疑问词+is/was +it +that+其他句子成分。

5.为了论述第五个句型我们先看一道题。

It is eight oclock the newspapers are delivered here in the morning.

A.thatB.when

C.untilD.while

有些学生会选A，认为这是个强调句。我们知道强调句可以还原成原来的句子，因此它可变成： The newspapers are delivered here eight oclock in the morning.

仔细观察就会发现，改写后的句子不完整，在eight之前应该有一个介词at。因此A是错的，正确答案是B。该题考查的句型是：It is/was+时间点+when+从句。例如：

It is seven when we get up every morning.

巩固练习：

1.It is almost five years we saw each other last time.

A.beforeB.since

C.afterD.when

2.—Do you know our town at all?

—No,this is the first time I here.

A.wasB.came

C.have beenD.am coming

3.Scientists say it may be five or six years it is possible to test this medicine on human patients.

A.sinceB.after

C.beforeD.when

4.It long before we the result of the exam.

A.wont be；will know

B.is；will know

C.wont be；know

D.is；know

5.—Did Jack come back early last night?

—Yes. It was not yet eight oclock he arrived home.

A.beforeB.when

C.thatD.until

6.It was only when I reread his poems recently I began to appreciate their beauty.

A.untilB.that

C.thenD.so

7.It is Jack and Tom late for the meeting.

A.that isB.who is

C.that areD.which are

8 It we had stayed together for several weeks I found we had much in common.

A.was until；whenB.was until；that

C.wasnt until；whenD.wasnt until；that

9.—I cant find Mr.Smith. Where did you meet him this morning?

—It was in the hotel he stayed.

A.whereB.that

C.whichD.the one

10.— that he managed to get himself through the hard time?

—Oh, a friend of his helped him.

A.Where it wasB.Who was it

C.How was itD.How it was

答案：1~5BCCCB6~10BCDAC

（作者单位：河南省洛宁县第一高级中学）