2019春七年級(jí)英語(yǔ)下冊(cè)Unit4Don’teatinclass語(yǔ)法專練課時(shí)作業(yè)新版人教新目標(biāo)版

1、1Unit 4 Don t eat in class單元語(yǔ)法專練阿闔精l|講l|祈使句1。定義。用來表達(dá)命令、請(qǐng)求、勸告、警告、禁止等的句子叫作祈使句。祈使句通常省略主語(yǔ)you。例如：Be quiet,please。請(qǐng)安靜。Please have a seat 。請(qǐng)坐。2。句式結(jié)構(gòu)。(1 )Do 型：動(dòng)詞原形+賓語(yǔ)+其他。例如：Go this way,please。請(qǐng)這邊走。(2 )Be型:Be+表語(yǔ)+其他。例如：Be a good kid!做個(gè)好孩子！(3 兒 et型:Let+賓語(yǔ)+動(dòng)詞原形+其他。例如：Let me help you 。讓我來幫你。注意:祈使句的否定形式一般是在動(dòng)詞原形前加

2、dont 構(gòu)成，有時(shí)也可直接用 no 開頭表示禁止。例如：Don t be late for school!上學(xué)不要遲到！No smoking!禁止吸煙！have to 與 must 的用法have to 和 must 均可表示“必須”。 must 更加強(qiáng)調(diào)說話者的主觀意愿 ;而 have to 強(qiáng) 調(diào)客觀的必要性，意為“不得不”。兩者的否定式含義大不相同。 must nt 表示“不準(zhǔn)；禁 止”，而 don thave to 表示“不必”。例如：I must go now,or I ll be late。我現(xiàn)在必須走了，不然我就會(huì)遲到了。She has to help her mother l

3、ook after her sister。她不得不幫著她媽媽照顧妹妹。You mustn t swim in the river。你不準(zhǔn)在河里游泳。You don t have to do it now。你現(xiàn)在不必做這件事。注意:以 must 開頭的一般疑問句，其肯定回答用 must,否定回答用 need nt 或 don t have to。例如:Must I finish the work n ow? 我現(xiàn)在必須完成這項(xiàng)工作嗎？Yes,you must。/No,you don t have to 。是的，你必須完成。/不，你不必現(xiàn)在完 成。I。根據(jù)句意用所給詞的適當(dāng)形式填空1。Do ( d

4、o ) the work right no w,Jim2。 Please tell ( tell ) me the news。23。Let s play ( play ) soccer now。4。You must come ( come ) to school on time35。No talking（ talk ） here!n。根據(jù)句意用 must 或 have to 的適當(dāng)形式填空1。You must do it yourself。2。 一 Must I read the book in the reading room?No,you don t have to。3。It s late

5、 。 Jim has to go home。4。一 Must Lily keep quiet?Yes,shemust 。5。You dont have to get up early on weeke nds川。按要求完成句子，每空一詞1。You can t listen to music when your mother is sleepingDont listento music whe n your mother is sleep ing2。He has to be in bed by ten oclock。（改為一般疑問句Does he have to be in bed by ten o3。You must come here early this after noonCome here early this after noon。4。 Let her help you。(改為否定句)Dont let her help you 。5。She has to ride her b