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附加疑问句（Tag Question）附加疑问句有以下四种形式：①肯定陈述句+否定的附加疑问句That clock is slow, isn’t it?②否定的陈述句+肯定的疑问句That clock isn’t slow, is it?③肯定陈述句+肯定的疑问句That clock is slow, is it?④否定的陈述句+否定的附加疑问句That clock isn’t slow, isn’t it? 前两种是主要的，后两种形式仅在特定的语境中表示感情色彩。
附加疑问句也可以由“祈使句 + 附加问句”构成e.g. Carry this parcel for me, will you?Remember to buy some meat, won’t you?a)当陈述句部分的主语是everybody, everyone, someone, no one, nobody, somebody等指人的合成词时，附加问句部分的主语在正式语体中通常用he。
e.g. Everybody knows what he has to do, doesn’t he?Nobody wants to go there, does he?None of the boys can do it, can he?在非正式语体中则往往用they。
e.g. Nobody phoned while I was out, did they?Everyone enjoyed the party, didn’t they?Somebody borrowed my pen yesterday, didn’t they?但若陈述部分的主语是everything, anything, something, nothing等指物的合成词时，附加问句部分的主语只能用it。
e.g. Nothing could make me give it up, could it?Everything is ready, isn’t it?b)当陈述部分是there-存在句时，附加问句部分主语也用~there？e.g.There’s no help for it, is there?There’s something wrong, isn’t t here?c) 陈述部分带有seldom, hardly, never, rarely, few, little, nowhere, nothing等否定词或半否定词时，附加问句部分用动词肯定形式。
一基本组成方法1. 肯定式陈述部分+否定附加疑问部分（前肯后否）You often play badminton, don’t you?否定式陈述部分+肯定附加疑问部分（前否后肯）They can’t finish it by Friday, can they?补充：1）当陈述句中含有seldom, hardly, never, rarely, little, few, none, neither，no, not, nowhere, nothing no one, nobody等否定意义的词时，后面的附加疑问句则为肯定形式。
They seldom come late, do they?He made no answer, did he?2）如果陈述句中仅含否定前缀的词unhappy, dislike, impossible等，则后面的附加疑问句仍为否定形式。
It is impossible, isn’t it?3.祈使句的附加疑问句（1）肯定的祈使句的附加疑问句在句末加“will you? /won’t you?/can you ?/ can’t you?”（2）否定的祈使句的附加疑问句通常在句末加“will you?”（3）Let's 开头的祈使句，附加疑问句用shall we?（4）Let us 开头的祈使句，附加疑问句用will you?二附加疑问句注意几种特殊情况：1. 当陈述部分主语是everyone/ everybody, someone/somebody, no one/ nobody, none等表示人的不定代词时，附加疑问句部分的主语多用they，但也可用he；当陈述部分的主语是everything, anything, something, nothing等表示物的不定代词时，附加疑问句部分的主语用it。
Nobody saw him walk into the room, did they?Everything has gone wrong today, hasn’t it?2.当陈述部分的主语是指示代词this, that时，附加疑问句的主语要用it。
