There are sewen days in a week.

一周有七天。

He has sewen books on his shelf.

他的书架上有七本书。

I have sewen apples in my basket.

我的篮子里有七个苹果。

The movie starts at sewen o'clock.

电影在七点钟开始。

She wakes up at sewen every morning.

她每天早上七点起床。