肯定句变否定句一、 有be动词（am, is, are）的，可以在这些单词后面直接加not. 注意缩写 is not= isnt are not= arent二、 有情态动词（can, would）的，可以在这些单词后面直接加not. 注意缩写 can not=cant would not=wouldnt三、 没以上那些单词只有动词的，像walk, swim, run, clean, eat, drink, sleep 等等，需要在动词前加do, 然后再加not, 即 dont.例子：I am a nurse. I am not a nurse.1、 He is my father.He _ _ my father.2、 Id like a pie.I _ _ like a pie.3、 This is a book.This _ a book.4、 Tim and Tom have two robots.Tim and Tom _ hav
