有了营改增,建筑业:是不是WHAT WHO HOW WHRER等特殊疑问词后面若用行为动词则必须加DO?

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?

不一定
1)除了用do,根据需要还可以用can ,could,will等等情态动词加行为动词
例如:what can you see in the sky?

2)who 引导的疑问句就不用加do
例如:who made this cake?

3)这些疑问词用在从句中,就不加do
例如:I don't know how to get along with him.
you should remember what you learn.