1. They don’t believe she’s an engineer, do they?
(当主句陈述部分为非第一人称主语加think、suppose、believe、fancy、imagine、expect等加that从句的时候,问句部分的动词要和陈述部分的主句动词和主语保持一致。)
2. Do help yourself to some fruits, won’t you?
(当陈述句为祈使句时,疑问句为will you或won’t you,但是Let’s 开头的除外)
3. Let’s go to the cinema, shall we?
(Let’s 开头的祈使句,后面疑问句用shall we。)
4. This is the book you like, isn’t it?
(当陈述句主语是this/that时,疑问句主语用it。)
5. To fight against him is the best choice, isn’t it?
(当陈述句主语是不定式时,疑问句主语用it。)