how many legs does crab have?为什么要加个have

来源：学生作业帮助网编辑：作业帮时间：2024/05/19 19:51:54

DOes 是助动词无实义,必须有实义动词充当谓语的中心词HAVE就是在这里充当这个成分

表示“有”多少条腿啊。

have是有的意思，整句的意思是螃蟹有多少条腿，当然要加一个have

没有have句子就没了谓语，不完整且意思表达不清楚

have“有”的意思。

crab (螃蟹)have（有）how many legs（多少条腿）？ does(助动词)
宾语前置之后就是how many legs does crab have?

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