before和till的区别例 i'm sorry you've been waiting so long,but it wil_英语解答

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）

人气：165 ℃　时间：2019-12-29 19:50:10

解答

before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 independe...