how soon是對(duì)將來(lái)時(shí)間提問(wèn)，如：He will be back in two days.如果就in two days提問(wèn)，要用how soon。而how long是對(duì)一段時(shí)間提問(wèn)，如：He usually spend two hours to do his homework every day.如果就two hours 提問(wèn)，要用how long。

how soon和how long的區(qū)別

1、時(shí)態(tài)不同：“how soon”，只可以用于一般將來(lái)時(shí)；而“how long”，可用于各種時(shí)態(tài)。

2、意思不同：“how soon”，具有“多少時(shí)間之后、多快、多久”等意思，例如：How soon will it take to get to Beijing?到北京需要多久？而“how long”，具有“多長(zhǎng)、多久、多長(zhǎng)時(shí)間”等意思，例如：How long is this section of the road?這段馬路有多長(zhǎng)？

3、強(qiáng)調(diào)的側(cè)重點(diǎn)不同：“how soon”，側(cè)重于“某人能夠多快完成某事”；而“how long”，側(cè)重點(diǎn)于“對(duì)某段時(shí)間的提問(wèn)”。

how soon和how long的例句

1、How long have you been in your present job?

你干現(xiàn)在這工作多長(zhǎng)時(shí)間了？

2、Time how long it takes you to answer the questions.

記一下自己回答這些問(wèn)題所需的時(shí)間。

3、How long can a human being go without sleep?

人不睡覺(jué)能活多久？

4、How soon would you like the telephone put in?

電話您希望何時(shí)安裝？

5、How soon will the boy leave Shanghai? In one year.

這個(gè)男孩什么時(shí)候離開(kāi)上海？一年以后。

6、How soon will his sister come back? In two weeks.

他的姐姐還要過(guò)多久才回來(lái)，過(guò)兩周。