文档介绍：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、?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'(not)(not)(not)(not)(not)(not)(not)'taren'tamnotisn'taren'taren'tisn'、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'(cannot)(mustnot)(shouldnot)(willnot)'tmustn'tshouldn'twon'、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'、、(do、does)+'''.、’’’.