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before引导的四种句型
时间:2025-06-14 09:29:01
答案

(1) before sb can/ could … 某人还没来得及……

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

我还没来得及插话,他就给我量好了尺寸

(2) It will be +时间+ before +从句; 还有多长时间……

例:It will be 4 years before he graduates.

他还有四年时间变毕业了。

(3) had done some time before (才……)

例:We had sailed four days and four nights before we saw land.

我们航行了四天四夜才见到陆地。

(4) had not done ... before ... 不到……就……

例:We hadn’t run a mile before he felt tired.

我们还没走到一英里路就觉得累了。

before引导的四种句型
答案

"Before"是一个常用的英语连词,常用来引导时间、条件和否定等副词从句,以下是四种使用"before"引导的句型:

1. Before doing something, (先做某事):在这种句型中,"before"引导的是一个时间副词从句,用来表示在做某件事情之前需要先做另一件事情。例如:Before going to bed, I like to read a book. (睡觉前我喜欢看书)

2. Before long, (不久之后):在这种句型中,"before"引导的是一个表示时间的短语,通常是用来表示一件事情不久之后就会发生。例如:He will be home before long. (他不久就会回家)

3. Before he knew it, (不知不觉):在这种句型中,"before"引导的是一个时间副词从句,用来表示某个人或事情在他/它还没有察觉之前已经发生了。例如:Before he knew it, he had already eaten the entire cake. (他不知不觉间已经把整个蛋糕吃完了)

4. Before +否定词, (除非):在这种句型中,"before"引导的是一个条件从句,通常用来表示某件事情只有在某种条件满足时才会发生,否则不会发生。例如:Before you leave, make sure you lock the door. (除非你锁上门,否则不要离开)。

before引导的四种句型
答案

1. Before + 名词/代词/动词的-ing形式,表示在某事之前发生的动作或状态。

例如:

Before leaving home, she always checks that she has her keys.

走之前,她总是检查她有没有带钥匙

He had never seen the sea before.

他以前从没有见过大海。

2. Before + 句子,表示在某事发生之前的情况

例如:

I need to finish this report before I leave for the weekend.

我需要在周末离开之前完成这份报告。

She wanted to talk to her boss before he left the office.

她想在老板离开办公室之前和他谈谈。

3. Before + 现在完成时,表示完成某事前已经做了某个动作。

例如:

I have never seen such a beautiful sunset before.

我以前从未看过如此美丽的日落。

She has already finished her work before her colleagues arrived.

她在同事到达前已经完成了工作

4. Before + 过去完成时,表示完成某事以前已经做了某个动作。

例如:

He had studied hard before he took the exam.

他参加考试前已经努力学习了。

They had already eaten dinner before they went to the cinema.

他们去电影院之前已经吃过晚饭了。……

对于这个问题,我还需要更多的上下文和信息才能回答。您可以给我更多的细节和背景吗?需要帮助的是什么?谢谢!

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