先把否定句变成肯定句，再把肯定句中的be 动词或者情态动词提前就可以了，呵呵！for example: he is not an active boy. 变成 he is an active boy. 变成 is he an active boy? you can not help me. 变成 you can help me. 变成 can you help me? 欢迎采纳！
be动词，情态动词，助动词移到前面去。 She can't swim. Can she swim? She doesn't do well in English. Does she do well in English? She isn't a teacher. Is she a teacher. 当然具体情况具体分析。