dream的过去式怎么写

　　She walked around in a dream all day.

　　她整天都在梦游似的到处转悠。

　　Only in his dreams does he give expression to his fears.

　　他只有在梦中表现出恐惧。

　　When she finally fell asleep, she began to dream.

　　她终于睡着了，并开始做梦。