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英语语法what is / what are / what was,were和what do / what does /

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英语语法
what is / what are / what was,were和what do / what does / what did有什么差别
is ..are.was...开头的句子和do...does.did.开头的句子有什么不同
英语语法what is / what are / what was,were和what do / what does /
what is 是对单数概念的名词提问的疑问词
what are 是对复数概念的名词提问的疑问词
what was 则是对单数概念的名词的过去时态提问的疑问词
what do 是对复数概念提问的
what does 是对单数概念提问的
what did 则是对过去时态提问的 单复数都行
is are was 开头的句子是一般疑问句
do does did 开头的句子是特殊疑问句