高中英语状语从句精讲 before的固定句型和用法总结

before的用法

before在英语中是一个比较常用的虚词，它既可作介词或副词用，也可作从属连词用。在近几年的高考试题中常常出现考查其从属连词用法的题目。下面就把其作为从属连词的用法归纳如下：

1. 表示“在 之前就 ”。

Mary had finished her homework before her mother returned.

One of the true tests of leadership is the ability to recognize a problem __before______ it becomes an emergency

句意：领导能力的真正考验之一是有能力在成为紧急情况之前就识别到问题。

2. 表示“过了多久后才 ，动作进行到什么程度才 ”。

The man almost knocked me down before he saw me.

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

3. 表示“来不及；尚未 就 ”。

Before I could get in a word, he had measured me.

She left the company before I could have a word with her.

4. 表示“刚 就 ”

I had hardly sat down before the bell rang.

5. 表示“不知不觉就 ；还没弄清就 ”

Time passed quickly and three months went by before Aqiao knew it.

6. 表示“宁愿 ，决不 ，与其 ，毋宁 ”常与will或would连用。

I would die before I would tell. I would / will die before I surrender .

7. 表示“否则；以免”

Do it now before you forget.

I will write it down before I forget it .

8. 用于句型“it was +时间段+ before ”表示 “过了多久才 ”

It was three days before he came back.

9. 用于句型“it was not long +时间段+ before ”意为“不久就 ”

It was not long before he sensed the danger of the position .

10. 用于句型“it will be(not )+时间段+ before ”表示“要过多久/ 不久 才 ”

It will be half a year before you graduate from this school.

It will be not long before you find you are wrong .

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