sleep的过去式和过去分词

　　The bed was rumpled where he had slept.

　　床上他睡过的地方乱糟糟的`。

　　Steve took a turn driving while I slept.

　　我睡觉时，史蒂夫接着开车。

　　He can't have slept through all that noise.

　　他不可能在那种闹哄哄的环境里睡好觉。