knock...into... 把......插进，把......敲入

　　knock into/against 撞上

　　①Knock down the machine before shipping.

　　在装运前把机器拆卸开来。

　　②Listen！Someone is knocking at/on the door.

　　听！有人在敲门。

　　③Be careful！Don't knock against/into the wall.

　　当心！不要撞到墙上。

　　 from time to time偶尔，有时

　　(教材P30)These days，Roy and I see each other from time to time，but we're no longer close.

　　最近，我和罗伊还时而见面，但已经不再那么亲密了。

　　①He called at our home at times.

　　他有时到我们家玩。

　　②She was a nurse at one time.

　　她曾经是个护士。

　　 lose interest in对......失去兴趣

　　(教材P30)He had always been a clever，hard­working student but now he seemed to lose all interest in his work.

　　他曾经一直是一个聪明、勤奋的学生，但现在他似乎对学习一点也不感兴趣了。

(1)take/have/show/feel an/no interest in