e是系动词,后接表语,do是我们一般所讲的动词,后接宾语或者直接完句.
这里的do是eat这个动词在疑问句中的前置,eat本身是do动词,所以前置时候分拆出来的也是do.
be与do的区别why on earth do you eat me?这里为何不用are?
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