who提问动词单复数

当who在句中作主语时谓语动词要用三单形式，疑问词作主语时，谓语动词一定用单数第三人称形式，叫做“状况不明，视为单数”。当who在句中作宾语时，根据主语的形式决定。如their是第三人称复数，则不用三单形式。

who在定语从句中用法：

先行词为anyone，one，ones时;先行词为those，he和people时;这些词代替指人，whom在定语从句中指人，"who"和“that”既可作主语又可作宾语(作宾语可以省略,who作宾语变为whom)，that可以指人也可以指物, who不可指物 。在从句中所起作用如下：

(1)Is he the man who/that wants to see you? 他是那个想见你的男人吗?(who/that在从句中作主语)

(2)He is the man (whom/that) I saw yesterday. 他就是我昨天见到的那个人。(whom/that在从句中作宾语)

(3)The man whom you spoke to just now is our English teacher. 刚刚和你说话的那个男人是我们的英语老师。(whom在从句中作宾语)

2,which，that 用来指物(有六种情况只可用that而不用which)

(用作主语、宾语，作宾语时可以省略)，例如：

(1)The prosperity which/that had never appeared before took on in the countryside.农村出现了前所未有的繁荣。(which/that在从句中作主语)

(2)The package (which/that) you are carrying is about to come unwrapped.你拿那个包裹快要散开了。(which/that在从句中作宾语)