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课件网) UNIT 3 SPORTS AND FITNESS Discovering Useful Structures 附加疑问句 (Tag Question) P109 特点：“前肯后否”或“前否后肯” 特殊情况 不同时态/句式的附加问句构成 1. 含be动词（am/is/are/was/were） She is from the US, isn`t she They weren`t late yesterday, were they 特殊：I am a teacher, aren`t I （am的否定附加问句用aren`t，不用amn`t） 2. 含实义动词（一般现在/过去时） 一般现在时：借助助动词do/does（主语为三单用does） He plays the piano well, doesn`t he They often go hiking on weekends, don`t they 一般过去时：借助助动词did She visited her grandparents last week, didn`t she We didn`t watch the movie, did we 3. 含情态动词（can/could/will/would/should/may/must） He can speak French, can`t he They should finish the task today, shouldn`t they 特殊：must表“必须”时，附加问句用needn`t；表“推测”（一定）时，按陈述句谓语动词时态判断： You must finish your homework first, needn`t you （必须） He must be at home now（=He is at home now）, isn`t he （推测现在） They must have arrived yesterday（=They arrived yesterday）, didn`t they （推测过去） 陈述句的主语是名词时，附加问句的主语用相应的人称代词来代替 例：Beijing is a beautiful city, isn`t it 特殊结构（高频易错点） 1. 陈述部分为否定转移句型（think/believe/suppose/expect等动词+宾语从句） ① 附加问句的肯定/否定根据从句判断，主语与从句一致（主句主语为第一人称I/we）； I don’t think he will come, will he （从句否定，附加问句肯定） We believe she can finish it, can’t she （从句肯定，附加问句否定） ② 主句主语为二、三人称时，附加问句根据主句判断。 He doesn’t think she is right, does he （主句否定，附加问句肯定） 2. 陈述部分为祈使句 ① 肯定祈使句：用“will you ”或“won`t you ”（表委婉请求） Open the window, will you Please pass me the book, won`t you ② 否定祈使句：只用“will you ” Don`t talk in class, will you 特殊： Let`s...（包含说话人）→ 附加问句用“shall we ”； Let us/me...（不包含说话人）→ 用“will you ” Let`s go for a walk, shall we Let us help you, will you 3. 陈述部分含不定代词 ① 陈述部分主语为指人的不定代词（somebody/anybody/everybody/nobody）：附加问句主语用they或he； Everybody is here, aren’t they （=isn’t he ） ② 陈述部分主语为指物的不定代词（something/anything/everything/nothing）：附加问句主语用it。 Nothing is difficult if you try, is it 4. 陈述部分含指示代词 ① 陈述部分主语为指示代词（this/that）：附加问句主语用it； That sounds interesting, doesn`t it ② 陈述部分主语为指示代词（these/those）：附加问句主语用they。 Those are apples, aren`t they 5. 陈述部分为存现句（附加问句仍用there） There was a hospital here, wasn`t there 6. 陈述部分含have to（附加问句通常用do的相应形式） You had to finish the task, didn`t you 7. 陈述部分含否定词（never/seldom/hardly/scarcely/few/little/no/none等）：陈述句视为否定，附加问句用肯定 He seldom goes out alone, does he There are few books on the desk, are there 注意：若陈述部分含带否定意义词缀的词，附加问句仍用否定。 It is unfair, isn`t it 易错点纠正 1. 错误：She likes singing, isn’t she → 正确：d ... ...
