2. how far 用来提问距离，多远，其答语分为两种：

(1)用长度单位表示：It is five kilometers.

(2)用时间表示：It’s twenty minutes’ walk.

3.how long 用来提问时间，意为多久回答常用“for+段时”。

----How long have you learnt English?

----For 3 years.

4.how soon 用来提问做完某事还需要多长时间， 常用于将来时态时， 常用“in+时间段”来回答。

――How soon will you arrive in Beijing?

----In 3 hours.

(二)宾语从句

1.在句子中起宾语作用的句子叫宾语从句。宾语从句用陈述语序。

2.宾语从句的连接词：

(1)从属连词有that, if, whether。

Nobody knew whether she could pass the exam.

I know that she is from America.

(2)连接代词有who, whom, whose, what 等

Do you know whose book it is?

Could you tell me what your father looks like?

(3)连接副词有when, where, why, how等

He didn’t tell me when we could meet again.

I don’t know how I can get there. wwW.x kB 1.c Om