what does it mean?为什么用does而不用is

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what does it mean?为什么用does而不用is

what does it mean?为什么用does而不用is
what does it mean?为什么用does而不用is

what does it mean?为什么用does而不用is
因为mean 是实意动词,is 后面不能接实意动词原型.

此处的mean是动词

mean 为动词 助动词用do 或does 又因为是it ,必须用三单,所以用does
若用is 应该换成名词:what is it's meaning?

用 is 应这样what is the meaning?
因为mean是实意动词 如 it means that. 对that 提问 就是what does it mean?