This is Lesson One.

这是第一课。

I'm not sure what time I'm coming back.

我不肯定我什么时间回来。

Before I eat dinner,I read the newspaper for a while.

在我吃晚饭以前，我花一会儿读报纸。

I don't feel very well this morning.

我今早感到不很好。

At bedtime, I take off my clothes and put on my pajamas.

在上床时间，我脱掉衣服并且穿上我的睡衣。

He needed a blood transfusion.

他需要输血。