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但如果陈述部分的否定词只有带否定前缀的词时,如unhappy, dislike, unfriendly等时,疑问部分要用否定形式。如: He looks unhappy, doesn't he?他看上去不高兴,不是吗? The girl dislikes history, doesn't she?这女孩不喜欢历史,不是吗?They were unsuccessful, weren’t they? 3.think, believe, suppose, imagine, expect等动词后接宾语从句构成的主从复合句在构成反意疑问句时,视情况不同有两种不同的构成方式。 (1.)当主句的主语为第一人称时,其后的简短问句应与从句相一致。例如: I expect our English teacher will be back this weekend, won't she/he? We suppose you have finished the project, haven't you? 值得注意的是,当这些动词后接的宾语从句的否定转移到主句时,其仍属否定句,故其后的简短问句应用肯定式,而非否定式。例如: I don't believe that he can translate this book, can he? We don't imagine the twins have arrived, have they? 6.当陈述部分有情态动词must,问句有4种情况: (1)mustn't表示“禁止,不可”时,附加问句通常要用must. You mustn't stop your car here, must you? 你不能把车停在这地方,知道吗? (2)must表示“有必要”时,附加问句通常要用