I can't understand why he is being so selfish. He isn't usually like that.

我不明白他此刻怎么这么自私。他平时不这样。

I was very tired this morning. I couldn't get up.

我早上很累，起不来。

The woman who lives next door is a doctor.

隔壁住着的那个女人是医生。

Look at those black clouds. It's going to rain.

看那成堆的乌云，要下雨啦！

Thank you .It was very nice of you to help me.

谢谢你帮我，你真好。

You must keep it a secret. You mustn't tell anybody else.

你必须保密，谁都不能讲。