疑問代詞who的用法
1.who在句中作主語：
Who's there?
who作主語通常視為單數(shù)，謂語動(dòng)詞要用單數(shù)。
改錯(cuò)題： Who are not at school today?改為is
其他主語例句： Who came when I was out?
Who put the light out before I finished my work?
2. who在句中作賓語：
Who have you chosen to take part in the sports meet?
你選了誰參加運(yùn)動(dòng)會(huì)？
此句重點(diǎn)是：主語是you，謂語動(dòng)詞用have，不能把who當(dāng)主語，謂語用has就錯(cuò)了。
其他例句：
Who did she lend the bike to?
Who did you see then?
3.who在句中作表語：
Who is she?
Who are this girl and this boy?
this girl and this boy是兩個(gè)人并列作主語，謂語動(dòng)詞用復(fù)數(shù)。
who用作疑問代詞時(shí)，意思是“誰”，一般只用來指人,在句中用作賓語或主語。
I wonder who that letter was from.
我不知道是誰來的信。
who用作限制性或非限制性的關(guān)系代詞，意思是“…的人，那個(gè)…”“他，她，他們”,在句中作主語。如：
The people (who) we met in France have sent us a card.
我們在法國結(jié)識的人給我們寄來了一張賀卡。