含情态动词must的反义疑问句

含情态动词must的反义疑问句陈述部分有must，且表示必须时，附加疑问句部分用mustn't，如果表示必要则用needn't。陈述部分中是mustn't表示禁止时，附加疑问句部分用must。陈述部分中的must表示一定、想必等推测意义时，附加疑问句部分而是根据陈述部分的谓语动词或其助动词来定。Theymustcleanthefloor,mustn'tthey/needn'tthey?他们必须擦地板，是不是？Wemuststayathome,mustn'twe?我们必须留在家里，是不是？Wemustn'tbelate,must/maywe?我们不许迟到，是不是？Theymustworkhard,mustn'tthey?(必须)Theymusttakemedicallessons,needn'tthey?(必要)Hemustbelyingtome,_____?A.mustn'tbeB.mustbeC.isn'tbeD.isbe他肯定在对我说谎。mustbedoing是对正在进行的事情的推断。还有musthavedone是对过去情况的肯定推断。must这种用法的反意疑问句不用must提问。推断用法：Hemustbelyingtome.陈述用法：Heislyingtome.陈述用法反意疑问句：Heislyingtome,isn'the?推断用法反意疑问句：Hemustbelyingtome,isn'the?推断用法：Hemusthavebeenabroad.陈述用法：Hehasbeenabroad.陈述用法反意疑问句：Hehasbeenabroad,hasn'the?推断用法反意疑问句：Hemusthavebeenabroad,hasn'the?推断用法：Hemusthavegoneswimmingyesterday.陈述用法：Hewentswimmingyesterday.陈述用法反意疑问句：Hewentswimmingyesterday,didn'the?推断用法反意疑问句：Hemusthavegoneswimmingyesterday,didn'the?Hemustbeavisitor,isn'the?(对现在情况的推测)Youmusthaveseenhimathisbirthdaypartyyesterday,didn'tyou?(对过去情况的推测,且句中有过去的时间状语)Youmusthaveseenhimathisbirthdayparty,haven'tyou?(强调动作的完成)1带haveto时，附加疑问用do或have的相应形式,用do更常见。Youdon’thavetogotoschoolonSundays,doyou?Wehavetoworktoday,don’twe?(haven’twe?)2带must时A表示“必须”，附加疑问部分用mustn’tWemustworkhard,mustn’twe?B表示“有必要”时，附加疑问部分用needn’t.Theteachermustshowconcernforeachpupil,needn’the?C表示“推测”时，附加疑问部分要与陈述部分的谓语动词相呼应。Hemustbeateacher,isn’the?Dmust+have+done是对过去情况的推测，当陈述部分没有明确的表示过去的时间状语时，附加疑问要用have的相应形式；当陈述部分有明确的过去时间状语时，附加疑问要用过去时。Youmusthavelivedhereforalongtime,haven’tyou?Youmusthaveseenhimyesterday,didn’tyou?E当陈述部分是mustnot,表示“一定不要”、“禁止”时，附加疑问除用must外，还可以用may.Imustnottellhim,mustI?(mayI?)3带usedto时，附加疑问用usedn’t或didn’t.但口语中倾向于后者。Thereusedtobeanappletreeinthegarden,didn’tthere?(usedn’tthere?)4带need时，附加疑问用do或need,应该与陈述部分need用法相呼应。Ineedn’ttellyoutheanswer,needI?Youneedtobuyabetterdictionary,don’tyou?5带oughtto时，附加疑问用ought.,但在美国英语中用shouldWeoughttohelpeachother,oughtn’twe?/shouldn’twe?