英语介词语法before后跟 啥

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英语介词语法before后跟 啥
英语介词语法
before后跟 啥

英语介词语法before后跟 啥
before既可以做介词,也可以做连词,做介词时,后接名词或代词;做连词时,一般连接句子

before+doing sth./sth.一种动名词,一种名次,或也可以接从句
例:before the class begins
before the class
before taking the class

before本来就是一个介词啊,一般是动词后跟一个介词被称为介词短语

before 后面可以跟
1.+ 时间。I need to finish my homework before 4:00PM.(我必须要在下午4点前做完作业)
2. +从句。It will take 3 hours before I can finish my home working. (要完成作业,还要3个小时)
3. +动名词做状语。 Please turn off ...

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before 后面可以跟
1.+ 时间。I need to finish my homework before 4:00PM.(我必须要在下午4点前做完作业)
2. +从句。It will take 3 hours before I can finish my home working. (要完成作业,还要3个小时)
3. +动名词做状语。 Please turn off the light before leaving the office. (离开办公室前请关灯)
希望有所帮助

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before是个介词,后面可以跟名词或名词词组,代词。
一、介词按其构成可分为:
1. 简单介词 at, in, on, to, since, until等。
如: He's worked there since 1998.
2. 复合介词 into, onto, out of等。
如: She is out of school. 她...

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before是个介词,后面可以跟名词或名词词组,代词。
一、介词按其构成可分为:
1. 简单介词 at, in, on, to, since, until等。
如: He's worked there since 1998.
2. 复合介词 into, onto, out of等。
如: She is out of school. 她毕业了。
3. 二重介词 from under, from behind, from out of, until after, except in等。
如: I'm from out of town. 我是从城外来的。
4. 短语介词 because of, instead of, in spite of等。
如: I went back not because of the rain, but because I was tired.我回去不是因为下雨,而是因为我累了。
二、介词的作用:
1. 表示地点: after, along, at, below, by, of, near, over, through, under等。
如:Near the village the boys are skating on the ice. 男孩子们正在村子附近的冰上滑冰。
They lay down under the shade of a tree. 他们躺在一棵树的树阴下。
2. 表示时间: about, after, across, at, during, for, in, of, till, until等。
如:After class he will tell us about the accident. 课后他将告诉我们有关事故的情况。
A heavy rain has been falling across three days. 一场大雨下了整整三天。
The accident happened during the night. 事故发生在夜间。
3. 表示动作: at, across, around, on, over, under等。
如:The earth goes around the sun. 地球绕太阳运行。
The car is under repair. 汽车在修理中。
4. 表示比较: as, like, above, over, with等。
如: She was something like her sister. 她有几份像她的妹妹。
Chinese is much more difficult in contrast with English. 和英语相比,汉语难得多。
5. 表示原因: about, for, from, with等。
如:Don't worry about my lessons. 不要担心我的功课。
Business kept me from coming. 我因事不能来。
He was angry with what I did. 他对我所做的很气愤。
6. 表示条件: to, with, without等。
如: Without your advice, he would have failed. 没有你的忠告他可能已经失败了。
7. 表示手段、方式: as, by, in, with等。
如: He behaved as a drunkard. 他的举止如同醉汉一样。
Learn the new words by heart.记住这些生词。
We see with our eyes.我们用眼睛看。
8. 表示距离、数量: from, in, within等。
如:My house is ten miles from the school. 我家离学校十英里。
They were thirty in all. 他们总共有三十人。
9. 表示目的: as, for等。
如:I only said it as a joke. 我只是把它当作笑话讲的。
It's time for class. 到上课的时间了。
10. 表示让步: for, with等。
如: For all his effort, he didn't succeed. 虽然他做了一番努力,仍不能成功。
With all his money, he is unhappy. 尽管他有钱,但他并不快乐。
for还可以引导插入语,
如: I, for one, shall vote against the proposal. 我也投票反对这个提议
以上希望对你有帮助。

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