精选优质文档-倾情为你奉上英语句型转换之一肯定句变否定句的技巧请同学们记住以下单词：1、be动词的五种形式：am, is, are, was, were；2、情态动词：can, could, may, might, must, shall, should, will,would, need, had better3、助动词：have, has, had一、动词后直接加not原句中含有be动词(am, is, are, was, were) 和情态动词(can, shall, will, may, should, would, might, had better等)时，要在动词后直接加not。如：1. I am a teacher. I am not a teacher. 2. Li Lei can swim. Li Lei cannot（ cant ）swim. 3. He will go to the zoo if it rains tomorrow. He will not（wont）go to the
