have a good day ( time ) 祝你过得愉快

　　一天不如意时可以说 I had a bad day，一天很开心时可以说 I am having a good time。当然，也可以像 have a nice trip一样，接除了 day ( time ) 以外的其他名词。

　　例句：

　　I've got to get some sleep. I had a rough day.

　　我得去睡觉了。今天过得很累。

　　I'm having a hard time these days.

　　我最近过得不好。

　　I'm just here with my friends having a good time.

　　我和朋友们在一起玩得很嗨。

　　Did you guys have a good time in Japan?

　　你们在日本玩得怎么样？

　　对话：

　　A: I'll be traveling in Europe for three weeks.

　　我要去欧洲旅行三个星期。

　　B: Have a good time. I really envy you.

　　祝你玩得愉快，说实话，羡慕死你了。