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陳述句變否定句陳述句:是用來陳述一件事情或表示一種看法,可分為肯定句和否定句兩種形式。 一、 變否定句:1. 當(dāng)謂語動(dòng)詞是be動(dòng)詞,am, is are或者過去時(shí) was, were時(shí),直接在這些詞后面加not構(gòu)成否定形式,即am not, is not=isnt , are not=arent。如果句子里有some,在否定句中要變成any。and 變成 or。 Eg. She is a beautiful girl. (改為否定句)- She isnt a beautiful girl.There are some students in Sun school. (改為否定句) -There arent any students in Sun school.2. 當(dāng)句子中謂語動(dòng)詞是助動(dòng)詞will,情態(tài)動(dòng)詞can, could, should, must等時(shí),直接在助動(dòng)詞和情態(tài)動(dòng)詞后加not 變?yōu)榉穸ň洹W⒁?will not = wont, can not=cant, must not =mustnt 表示禁止。如果句子里有some,在否定句中要變成any。and 變成 or。Eg .My family will go to Beijing and Qingdao next Sunday . (改為否定句)-My family will not go to Beijing or Qingdao next Sunday.They can run very fast. (改為否定句)-They cant run very fast.3. Eg.謂語動(dòng)詞是行為動(dòng)詞而又沒有助動(dòng)詞或情態(tài)動(dòng)詞時(shí),必須在謂語動(dòng)詞前加助動(dòng)詞,一般現(xiàn)在時(shí)加助動(dòng)詞do ,第三人稱單數(shù)加does,一般過去時(shí)加did,再和not構(gòu)成否定結(jié)構(gòu)。dont, doesnt, didnt后都用動(dòng)詞原形。如果句子里有some,在否定句中要變成any。and 變成 or。Eg Tom flies kites in the playground. (改為否定句)-Tom doesnt fly kites in the playground.We often play football after class. (改為否定句)We dont often play football after class.練習(xí)1) Mike is a student at Sun school. (改為否定句) Mike _ _ a student at Sun school.2) There are some apple juice in the fridge。(改為否定句)There _ _ _ apple juice in the fridge.3) I am happy and excited to hear that good news. (改為否定句)I am _ _ happy _ excited to hear that good news.4) She will go swimming next week. (改為否定句)She _ _ go swimming next week.5) My parents can cook meat with potatoes . (改為否定句)My parents _ _ cook meat with potatoes.6) You must do your homework now. (改為否定句)You _ do your home work now.7) Jill has lunch at school every day. (改為否定句) Jill _ _ lunch at school every day. 8) The children had a good time at the party. (改為否定句) The children _ _ a good time at the party. 9) Rose didnt watch TV this morning.(改為肯定句) Rose _ _ this morning. 10) She does exercises at home in the evening.(改成否定句、)She _ _ exercises at home in the evening.11) He said something important at the meeting.(改為否定句)He _ _ _ important at the meeting.12) He reads English every morning. He _ _ English every morning.13) They can swim across the river. They _ _ swim across the river.14) I have some bread to eat. I _ _ _ bread to eat.15) They are playing basketball.

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