高三 英语知识_高三英语知识点汇总

高三 英语知识由刀豆文库小编整理，希望给你工作、学习、生活带来方便，猜你可能喜欢“高三英语知识点汇总”。

高三 英语知识

Before 的用法：

1．表示“在……之前”。说明两个时间或两个事件之间的先后关系。

1)They had got everything ready before I arrived．

在我到达之前他们已经把一切都准备好

2)She didn’t understand me before I explained it to’her．

在我向她解释之前，她不理解我的意思

3)The train had left before I arrived at the station．

2．表示“……才…… ”，强调从句的谓语动词所表达的时间、距离很长或花费的力量比较大。

1)The workers worked long hours for two weeks beforeeverything returned to normal．

2)We waited a long time before the train arrived．

3)The American Civil War last four years before the North won in the end.3．表示“还未来得及……就……”，强调主句谓语动词所表达的时间、距离很短或花费的精力比较小。

1)Before I could figure out what had happened，he forced meinto the car．

我还不知道发生了什么，他就强行把我推进了汽车。

2)He jumped into the water before I could stop him．

我还没有来得及阻止他，他就跳进了水里。

3)Her father died before she was born．她尚未出世父亲就去世了。

4．表示“趁着……还没”

1)We can set off early before it gets hot．

2)You’d better write the phrases down before you forget them．

趁着你还没有忘记，赶紧把这些词组写下来。

3)Please put them away before they are miing．

趁着他们还没有丢，把它们收好吧。

5．表示“一……就”、“刚刚……就”。与hardly．scarcely连用

1).He had hardly gone to bed before(=when)the door bell rang．

他刚刚睡下，门铃就响了。

2).She had scarcely got off the train before(=when)her daughterran towards her

她刚一下车，女儿就跑了过来。

6．表示“不知不觉多少时间已经过去了”。

1)He was so absorbed in his work that four hours had paed before he knew it．

他如此专注于工作，不知不觉四个小时就过去了。

2)Time paed quickly and three months went by before he knew it．

时间飞快地流逝，他没感觉到三个月已过去了。