422　keep out，keep up和keep up with

① keep out sb./sth.或keep sb./sth. out意为“使……不进入，使……在外”。也可说keep sb./sth. out of sth.。

These clothes may help you keep out the cold. 这些衣服可以帮助你御寒。（=keep the cold out）

He kept the dog out. 他把狗关在门外。

She keeps the children out of the room. 她不让孩子们进入那个房间。

You should keep out of such things. 你不要介入这些事情。

② keep up意为“继续”，相当于continue；也表示“使……不低落，保持”，相当于remain high。

I hope the fine weather will keep up. 我希望这好天气能继续下去。

He has kept up studying English. 他一直坚持学习英语。

Her courage kept up in the face of danger. 她在危险面前仍能鼓起勇气。

③ keep up with意为“赶得上，不落伍”，表示同时起步，不至于掉队。

We should keep up with the times. 我们应不落伍于时代。

提示

catch up with表示在已经落后或起步较晚的情况下“赶上，追上”，与keep up with有区别。

She can keep up with any other student in the class. 她能赶上班上任何一位学生。

After two weeks' absence from class，he had to study harder to catch up with his classmates. 缺课两周后，他必须更加努力学习，才能赶上同学们。