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小学阶段我们主要学习到了肯定句，否定句，一般疑问句和特殊疑问句。那么下面这些句子分别是什么性质的句子呢？为什么？1.Iwanttotakeaphoto.2.Doyouwanttogoinside?3.Snakescan'thear.4.WhatdoyoudoonFlagDay?5.Lauraisn'tfromtheUS.6.Haveyougotaruler?7.Whydoyoulikewinter?肯定句一般疑问句否定句特殊疑问句否定句一般疑问句特殊疑问句否定句：句中有____________否定词not一般疑问句：句首有___________句末有_______用Yes或No回答。am,is,are,was,were,can,couldhave,hasdo,does,did?：1.SheiswatchingTV.否定句_____________________________一般疑问句__________________________2.Theycanplayfootball.否定句_____________________________一般疑问句__________________________3.Samhasgotanewkite.否定句_____________________________一般疑问句__________________________Sheisn'twatchingTV.IsshewatchingTV?Theycan'tplayfootball.Cantheyplayfootball?Samhasn'tgotanewkite.HasSamgotanewkite?若句中有标志词am,is,are,was,were,can,couldhave,has时，变否定句，_______________________变一般疑问句，___________________在这些词后+not,可连写。把这些词提前，句末+？：若句中没有标志词am,is,are,was,were,can,could，have,has时，我们要根据句子时态借助动词do的各种形式：一般现在时：三单--非三单--一般过去时：doesdodid变否定句，借do,does,did,后面+not,放在主语后，动词前，原来动词变成原形。变一般疑问句，借do,does,did放在句首，句中动词变成原形，句末+？：1.Amylikesdolls.否定句_____________________________一般疑问句__________________________2.SimonwenttoBeijingyesterday.否定句____________________________一般疑问句__________________________Amydoesn'tlikedolls.DoesAmylikedolls?Simondidn'tgotoBeijingyesterday.DidSimongotoBeijingyesterday?一般现在时（三单）一般过去时