howlong和howfar區別

how long“多長”,詢問動作在時間上所持續的長度.其答語部分或劃線部分可能是：

1）“for + 時間段”,有時可能沒有介詞for.如：

---How long did he wait for you here?他在這兒等了你多久?

--- For two hours. 兩個小時.

It took him 20 minutes to finish his homework. (對話線部分提問)

→How long did it take him to finish his homework?

2）“since + 具體時間”,“since + 時間段 + ago”或者“since + 從句”.如：

---How long are you feeling like this? 像這樣已經多久了?

---Since last night.從昨晚到現在.

3）表示時間的between…and…,from…to…等介詞短語.如：

They were playing football from 9:00 to 10:00 yesterday. (對話線部分提問)

→How long were they playing football yesterday?

另外,how long也可以詢問某事物的具體長度.如：

---How long is the desk?這張桌子有多長?

---1.2 meters. 1.2米.

how far“多遠”,詢問路程、距離.如：

How far is it from here to school? 從這兒到學校有多遠

How far 的意思是多遠,一般引導提問路程的特殊疑問句

例：How far is it from your home to school? 你家到學校有多遠?

How long 的意思是多長時間,一般引導提問時間的特殊疑問句

例：How long have you been in America? 你在美國呆了多久?