2015年高考备考：高考英语必备句型20个汇总

　　句型7

　　…before…特殊用法(1)“没来得及……就……”

　　[例句

　　The roof fell before he had time to dash into the room to save his baby.

　　他还没有来得及冲进房间救孩子，房顶就塌了。

　　He ran off before I could stop him. 我还没有来得及阻止，他已经跑了。

　　To my great disappointment, my favorite singer left the concert before I could have a word with her.

　　让我非常失望的是，我还没有来得及和我最喜欢的歌手打招呼，她就已经离开了。

　　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。

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