keep up 是动副短语吗?为什么keep up 后面可以加with?

keep up 是动副短语吗?为什么keep up 后面可以加with? 有关keep和up 的短语 keep up with 的意思短语意思 keep不是跟形容词吗?这里为什么跟名词?可不可以换成形同此我以前一直记得用法是 keep silent 保持安静,但是最近经常看到keep silence 保持安静 这种用法.我记得初中的时候经常背的一个短语是ke 四个英语短语下列短语分别是什么意思?keep up withcatch up withmake up for keep up keep up keep up 有keep up sb.doing吗不是keep up是keep on 短语up 英语动词短语疑问I doubt whether he can ____ his efforts much longer as he looks very tired.A.keep up B.keep on C.keep back D.keep from我选的是B答案是A 为什么?In the reading room,we found her _____ at a desk,with her attention _____ keep up with 和catch up with 有区别吗 keep的短语 keep、keep up、keep on用法 keep off keep out keep up 请问look up是介词短语吗? Hurry up是个及物短语吗 有try up这个短语吗?