before和till的区别 例 i'm sorry you've been waiting so long,but i

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before和till的区别 例 i'm sorry you've been waiting so long,but it will still be some time Tom bac
i'm sorry you've been waiting so long,but it will still be some time ( )Tom get back.
选before还是till 为什么(详解)
1个回答 分类:英语 2014-11-06

问题解答:

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efore多用于肯定,例如
It will be a long time before we finish this dictionary.
我们需要很长的时间才能把这部词典编译完.
till多用于否定,例如
The struggle will not cease till the country achieves independence.
要到国家获得独立,斗争才会止息.
 
 
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