如何變否定句

1、如何變否定句貴州省貞豐中學 安平一如果句子中有助動詞am, is , are, was, were, will , shall , would , should , have /has /had（+動詞過去分詞）的時候，變否定句時直接在這些助動詞的后面加not。Eg. He is a student.He is not a student .They will play football tomorrow.They will not play football tomorrow .Tom has been to Beijing . （been是 be的過去分詞）Tom has not been

2、 to Beijing .二如果句子中有情態(tài)動詞:can ,may ,must ,need的時候，變否定句時直接在這些情態(tài)動詞的后面加notEg. She can sing . He can not sing.三如果句子中沒有助動詞am ,is , are, was, were, will ,shall ,would ,should ,have /has /had（+詞過去分詞）也沒有情態(tài)動詞:can ,may ,must ,need的時候，變否定句時，要借用助動詞do ,does ,did, 然后在do ,does ,did后面加not1.如果謂語動詞末尾加了字母s 或es的時候，要借用助動

3、詞does然后加not 。 最后將原來的謂語動詞末尾的字母s或es去掉，還原成動詞原形。即結構為：does not +動詞原形。Eg. He goes to school every day.He does not go to school every day.2. 如果謂語動詞是has+名詞或代詞的時候，要借用助動詞does然后加not 。 最后將原來的謂語動詞has還原成動詞原形have 。即結構為：does not +動詞原形。Eg. He has a pen. He does not have a pen .3. 如果謂語動詞是have+名詞或代詞的時候，要借用助動詞do然后加not，

4、后面部分照著抄。即結構為：do not +動詞原形。Eg. They have many books.They do not have many books .4. 如果謂語動詞末尾加了字母d 或 ed的時候，要借用助動詞did然后加not 。 最后將原來謂語動詞的字母d 或ed去掉，還原成動詞原形，即結構為：did not +動詞原形。Eg .I played basketball yesterday. You did not play basketball yesterday .5. 如果謂語動詞是不規(guī)則動詞過去式的時候，要借用助動詞did然后加not 。 最后將原來的不規(guī)則謂語動詞還原成動詞原形，即結構為：did not +動詞原形。Eg. They went swimming last week. （went 是go的過去式） They did not go swimming last week .6. .如果謂語動詞末尾沒有加字母s 或es 或 d 或 ed，也不是 has+名詞或代詞，也不是不規(guī)則動詞過去式的時候，要借用助動詞do然后加not，后面部分照著抄，即結構為：do not +動詞原形。Eg.They often clean their classroom. They do not often clean their classroom.四祈使