She has been to shanghai already变成否定和疑问句

She has been to shanghai already变成否定和疑问句

题目
She has been to shanghai already变成否定和疑问句
答案
She hasn't been to shanghai yet. 她还没有去过上海.此时already 要换成yet, yet一般用在否定句中.
Has she been to shanghai? 她去过上海吗?
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