讲义
How did you know him? I got to know him accidentally.

你是怎么认识他的？ 我是无意间认识他的。

How do the deaf communicate with each other? By using sign language.

聋哑人士彼此怎么沟通？ 用手语。

How far is your house from here? About 20 minutes’ walk.

你家离这儿有多远？ 走20分钟左右。

How many times have I told you to study hard?

我跟你讲过多少次了要用功一点？

How often do you have a haircut? 你多久理一次发？

How soon will your mother be back? In an hour.

你妈妈多久会回来？ 一小时。