2015年高考备考：高考英语必备句型20个汇总

句型8

…before…特殊用法(2)“过了多久才……”或“动作进行到什么程度才……”

[例句

They walked about fifty miles to the west before they saw a village.

他们西行50英里才看到一个村庄。

The workers worked day and night about three days before everything returned to normal.

工人们连续工作3天才使一切恢复正常。

He almost knocked me down before he knew it.

他几乎撞到我了才意识到。

We had walked a long way before we found some water.

我们走了很长的路才找到一点水。

Five years went by before I knew it. 不知不觉，五年过去了。

句型9

It was + 时间段+before….“过了多久才(怎么样)……”

It was not long before….“不久，就……”

It will (not) be +时间段+before….“要过多久(不久)……才……”(before从句谓语动词要用一般时态)

[例句

It was not long before he sensed the danger of the position.不久他就意识到他处境的危险。

It was five days before he came back. 五天后他才回来。

It will be half a year before you graduate from the school. 再过半年你才能毕业。

It will not be long before they understand each other. 他们大概不久就会互相了解。

句型10

in case of…(+n.) “以防;万一”;

in case that…“以防，万一……”(谓语动词用一般现在时态或should+动词原形)

[例句

In case of fire, what should we do?

Please remind me about it in case I forget/should forget. 万一我忘了，请提醒我。

In case (that) John comes/should come, please tell him to wait.

Please take your umbrella in case (that it rains/should rain).带上雨伞，以防下雨。

句型11

It强调句型

强调句的基本构成：It is/was + 被强调的部分 + who(主要指人时)/that + 其余部分

[注意

这种结构可以强调句子的主语、宾语、状语(包括时间，地点，方式，原因等)，但是不能强调谓语动词(参考句型15)。

原句的谓语动词如果是现在或将来时态，用It is…that/who….;

原句的谓语动词如果是过去时态，用It was…that/who….;

强调时间、地点、原因或方式时不要用when, where或how, 必须用that。