1.how long“多長(zhǎng)”,詢問動(dòng)作在時(shí)間上所持續(xù)的長(zhǎng)度.其答語部分或劃線部分可能是：
1）“for + 時(shí)間段”,有時(shí)可能沒有介詞for.如：
---How long did he wait for you here?他在這兒等了你多久?
--- For two hours.兩個(gè)小時(shí).
It took him 20 minutes to finish his homework.(對(duì)話線部分提問)
→How long did it take him to finish his homework?
2）“since + 具體時(shí)間”,“since + 時(shí)間段 + ago”或者“since + 從句”.如：
---How long are you feeling like this?像這樣已經(jīng)多久了?
---Since last night.從昨晚到現(xiàn)在.
3）表示時(shí)間的between…and…,from…to…等介詞短語.如：
They were playing football from 9:00 to 10:00 yesterday.(對(duì)話線部分提問)
→How long were they playing football yesterday?
另外,how long也可以詢問某事物的具體長(zhǎng)度.如：
---How long is the desk?這張桌子有多長(zhǎng)?
---1.2 meters.1.2米.
2.how soon“多久,多快”,詢問動(dòng)作在將來要經(jīng)過多長(zhǎng)時(shí)間才會(huì)發(fā)生.其答語部分或劃線部分可能是：in + 時(shí)間段.如：
He’s going to Zhengzhou in two days.(對(duì)話線部分提問)
→How soon is he going to Zhengzhou?
3.how far“多遠(yuǎn)”,詢問路程、距離.如：
How far is it from here to school?從這兒到學(xué)校有多遠(yuǎn)?參考資料：