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一般现在时之否法句一、系动词Be系列的否定句二、情态动词系列的否定句三、行为动词系列的否定句什么是否定句？对事物做出否定判断的句子就是否定句。一、系动词be系列的否定句的构成主语+be+not+其他isnot=arenot=isn'taren't1.Kitty(not)anEnglishgirl.2.We(not)students.3.I(not)fromTaizhou.4.She(not)tall.5.LucyandLily（not）goodfriends.6.Thosechairs(not)broken.7.Thebag(not)mine.isn'taren'tamnotisn'taren'taren'tisn't二、情态动词系列的否定句的构成主语+情态动词+not+动词原形+其他cannot=couldnot=mustnot=wouldnot=willnot=shouldnot=maynot=can'tcouldn'tmustn'twouldn'twon'tshouldn'tmaynotShe(cannot)speakEnglish.You(mustnot)openthedoor.They(shouldnot)beright.I(willnot)gotoJapan.can'tmustn'tshouldn'twon't三、行为动词系列的否定句的构成主语+助动词（do/does）+not+行为动词原形+其他什么时候用助动词do，does呢？当行为动词是第三人称单数形式时，用助动词does。当行为动词是原形时，用助动词do。donot=doesnot=don'tdoes'tTheseboysdonotlikeplayingfootball.ThegirldoesnotreadEnglisheverymorning.2、ThegirlreadsEnglisheverymorning.1、Theseboyslikeplayingfootball.一找找行为动词二变变助动词（do、does）+行为动词原形三加在助动词后面加not1.Ilikered.2.Theylikeorange.3.Wewalktoschooleveryday.Idon'tlikered.Theydon'tlikeorange.Wedon'twalktoschooleveryday.104.Hisbrotherplaysfootballafterschool.5.Itlookslikeahat.、6.Shehasacatathome.Hisbrotherdoesn’tplayfootball.Itdoesn’tlooklikeahat.Shedoesn’thaveacatathome.11提示：1、如果句中出现some在改否定句时一定要将其变为any。2、如果句中出现and在改否定句时一定要将其变为or。3、如果句中出现too在改否定句时一定要将其变为either。