1.do,does,did要根据时态.do,does用于一般现在时,当一般现在时的句子中谓语动词为原形的话,改为疑问加doeg.TheylikeEnglish.-------DotheylikeEnglish?LucyandLilycomefromtheUK.-------DoLucyandLilycomefromtheUK?而当一般现在时的句子中谓语动词后加s/es,改为疑问要在句首加does,并且将谓语动词改为原形eg.helikesenglish.-------doeshelikeenglish?heteachesusenglish.-------doesheteachusenglish?did用于过去时的一般疑问句,同样看谓语动词是否用了过去式,改时放在句首,谓语动词同样改为原形eg.theywantedtogohome.--------didtheywanttogohome?helikedtostayathomebefore.-------didheliketostayathomebefore?特别注意的是要仔细掌握不规则的动词过去式,尤其是跟原形一样的,举两例eg.hereadthenovellastnight.--------didhereadthenovellastnight?thebookcosthim30yuan.--------didthebookcostthem30yuan.2.isare,was,were简单的就是看句中有无这些词,有就提前放句首,后面的不变.具体而言isare在一般现在时中eg.heisastudent.--------isheastudent?theyarefromClass9--------Aretheyfromclass9?在一般现在时的被动语态中eg.englishistaughtintheschool--------isenglishtaughtintheschool在现在进行时中eg.theyarewatchingTVnow--AretheywatchingTVnowheislisteningtotheteacher-------ishelisteningtotheteacher在现在进行时的被动语态中eg.heiswashinghiscar.=hiscarisbeingwashedbyhm-----ishiscarbeingwashedbyhimwas,were在一般过去时中eg.hewaslateforschoolyesterday-------washelateforschoolyesterday在一般过去时的被动语态中eg.theteachergavehimapen=apenwasgiventohimbytheteacher--------wasapengiventohimbytheteacher在过去进行时中eg.hewaswatchingTVatnineyesterday-------washewatchingTVatnineyesterday在过去进行时的被动语态中eg.hewasdoinghishomeworkfrom7to9lastnight.=hishomeworkwasbeingdonefrom7to9lastnightbyhim.----washishomeworkbeingdonefrom7to9lastnightbyhim被动语态的知识可能你还不了解,若是的话现在可放在一旁,不必急于弄清,等你以后学到便能融会贯通打字很辛苦,盼能被采纳