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"Is" she often in a red skirt and black shoes?原是填空,为什么填is?

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"Is" she often in a red skirt and black shoes?原是填空,为什么填is?
do/does和is/are怎么分清?
因为此句缺动词,所以须用be动词.假如这个句子是"She often wears a red skirt and blck shoes"的话,疑问句则是用"does"了.但现在此句的肯定句是"She is often in a red skirt and black shoes",用了介词"in",所以缺少动词,语句不完整.do/does和is/are最好的区分方法,就是看句中是否已经有动词存在.如果有,就像我上面所说的,用do/does就可以,反之亦然.