before和till的区别 例 i'm sorry you've been waiting so long,but it will still be some time Tom baci'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）
问题描述：
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）
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...