专题:把肯定句改成否定句把肯定句改成否定句分以下情况:1、句中有be动词的,在be动词后加not;2、句中有情态动词的(can,should,must,would),在情态动词后面加not;3、句中没有be动词和情态动词的,在动词前加don’t或doesn’t;①句中动词为原形的,加don’t
如:Ilikeapples
Idon’tlikeapples
②句中动词为三单式的,加doesn’t,并将三单式的动词还原成原形
如:Helikesapples
Hedoesn’tlikeapples
③时态为过去时的,要加didn’t而且动词过去式要改为原形,例:Iwenttoschoolyesterday
→Ididn’tgotoschoolyeaterday
肯定句中的some在否定句中应改为any如:Therearesomestudentsintheclassroom
Therearenotanystudentsintheclassroom
将下列各句改成否定句1、Tom’sbrotheriswalkinginthepark
______________________________________________________3、ThestudentsofClass5arecleaningtheclassroom
______________________________________________________5、TomandMaryarefriends
______________________________________________________7、Therearesomebooksinthebookcase
______________________________________________________9、I’mastu