疑問代詞who的用法

1.who在句中作主語(yǔ)：

Who's there?

who作主語(yǔ)通常視為單數(shù)，謂語(yǔ)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(yǔ)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(yǔ)：

Who have you chosen to take part in the sports meet?

你選了誰(shuí)參加運(yùn)動(dòng)會(huì)？

此句重點(diǎn)是：主語(yǔ)是you，謂語(yǔ)動(dòng)詞用have，不能把who當(dāng)主語(yǔ)，謂語(yǔ)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(yǔ)：

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(yǔ)，謂語(yǔ)動(dòng)詞用復(fù)數(shù)。

who用作疑問代詞時(shí)，意思是“誰(shuí)”，一般只用來(lái)指人,在句中用作賓語(yǔ)或主語(yǔ)。

I wonder who that letter was from.

我不知道是誰(shuí)來(lái)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(yǔ)。如：

The people (who) we met in France have sent us a card.

我們?cè)诜▏?guó)結(jié)識(shí)的人給我們寄來(lái)了一張賀卡。