Question

1．He has made a living by himself since he was ten years old．（對(duì)劃線部分進(jìn)行提問(wèn)）
How long has he made a living by himself？

Answer 1

分析 自從他十歲的時(shí)候他就靠自己生活了．
他靠自己生活多久了？

解答 答案：How long．劃線部分是since從句，提問(wèn)用多長(zhǎng)時(shí)間，疑問(wèn)詞how long表示多久，故本題空格處填How long

點(diǎn)評(píng) how long"多長(zhǎng)"，詢(xún)問(wèn)動(dòng)作在時(shí)間上所持續(xù)的長(zhǎng)度．其答語(yǔ)部分或劃線部分可能是：
1）"for+時(shí)間段"，有時(shí)可能沒(méi)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(huà)線部分提問(wèn)）
→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．