who后面是does还是do
who作主语时谓语能不能用be？
who作主语时谓语能不能用be？
who作主语时，谓语可以是单数，也可以是复数。
who可以指单数，也可以指复数。所以，who 作主语时，谓语可以是单数，也可以是复数。如who does it who do itwho作表语、宾语时，根据主语确定谓语。
如who is he who are theywho does he work forwho do you work for 所以who要根据划线的主语的单复数来确定谓语形式
who is she，同义句？
Who is she她是谁？
同义句是，What is her name她叫什么名字？
还可以是，Do you know her你认识她吗？类似的情况还有很多。如，到午饭的时间了 Its time to have lunch. Its time for lunch.再如，This is his black door.这是他的黑色的门。同义句是，This black door is his.
who is是一般疑问句开头吗？
不是一般疑问句，是特殊疑问句的开头。
一般疑问句的开头是情态动词(can,will,would,may,must,Shall,Should )。be 动词(am, is, are, was, were )和助动词(do does, did )。
for example:
May I come in
Would you like to play basketball with me
Is she a doctor
Does she like drawing
who 是特殊疑问词，问谁？
Who is she
She is my Sister.
who后面加动词原形还是动词三单？
who后面加动词，动词究竟用什么形式，要根据句子的时态和who在句子中作什么成分。
例句：
一：当who作句子的主语时，要把who看作是第三人称单数形式。根据“主谓一致”原则，谓语动词不存在用动词原形。且句子的语序要用陈述语序，不能用疑问语序。
1.Who often helps you?
谁经常帮助你?
一般现在时，谓语动词用三单形式。
2.Who helped you yesterday?
昨天谁帮助了你?
一般过去时，谓语动词用过去式形式。
二：who不作主语(作宾语、表语)
1.作宾语
Who/Whom does he ofen help?
他经常帮助谁?
助动词does用三单形式，原谓语动词help用原形。
2.作表语
Who is that boy?
那个男孩是谁?
主语是boy,是单数，who是单数。谓语动词用is.
Who are those boys?
那些男孩是谁?
主语是boys，是复数，who是复数谓语动词用are.