keep a diary 记日记

He is too lazy to keep a diary. 他懒得写日记。

keep doing sth. 继续做某事

Don't stick at small difficulties, but keep going. 不要因为小小的困难就丧失信心，要继续坚持下去。

keep fit 保持健康

How to keep fit？ 如何保持健康？

keep. . from 阻止；使……免于

He couldn't keep the child from yelling. 他没法使孩子不大叫大嚷。

keep in touch (with) （与……)保持联系

Wherever you go, keep in touch with me, please. 无论你去哪里，请与我保持联络。

keep off 阻挡；不让……接近

Keep off the drugs, or you will be in great danger. 远离毒品，否则你将会很危险。

keep quiet 保持安静

In class, we obey the rules and keep quiet. 在课堂上，我们遵守规定，保持安静。

keep sb. busy 让某人忙个不停

This job will keep you busy for a long time. 这项工作会使你忙碌很长时间。