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1、歡迎來到英語課堂歡迎來到英語課堂第三課時(shí)第三課時(shí)Section A(Grammar Focus3c)單元同步語法精講(一)情態(tài)動(dòng)詞can1含義:情態(tài)動(dòng)詞can表示說話人的語氣或情態(tài),基本意思是“能;會(huì)”,沒有人稱和數(shù)的變化,在句子中不能常獨(dú)作謂語,其后須跟實(shí)義動(dòng)詞原形;can的否定形式為can not/cant/cannot;過去式為could,其過去否定形式為could not/couldnt。2can的用法表示能力,意為“能;會(huì)”等。Can you speak English?你會(huì)講英語嗎?Yes,I can.是的,我會(huì)。多用在口語中,表示請(qǐng)求或允許,意為“可以;能”等。用于疑問句中表示提
2、出要求;用于否定句中表示不允許。【注意】can表示請(qǐng)求,用于發(fā)出邀請(qǐng),如果接受對(duì)方的邀請(qǐng),常用Sure,Id love(like)to./Certainly/Of course.等來回答;如不接受,常用Sorry等來有禮貌地拒絕。一般情況下需要說明不能接受邀請(qǐng)的原因以表示歉意。eg:Can you come to my birthday party tomorrow?明天你能來參加我的生日聚會(huì)嗎?Sorry,I am afraid not.Im going to visit my grandpa.對(duì)不起,我恐怕不能去,我打算去看望爺爺。(二)have to的用法“have to”意為“不得不,
3、必須”,它強(qiáng)調(diào)一種客觀情況,有單、復(fù)數(shù)及時(shí)態(tài)的變化,其第三人稱單數(shù)為has to,過去式為had to。eg:His mother is ill.He has to stay at home and look after her.他媽媽病了。他不得不待在家里照顧她。have to 與must的區(qū)別:have to意為“不得不;必須”,它強(qiáng)調(diào)一種客觀情況。must意為“必須”,著重于說話人主觀上認(rèn)為有義務(wù)、有必要。eg:We have to go home now because its dark.我們現(xiàn)在必須回家因?yàn)樘旌诹?。You must do it yourself.你必須自己做。have
4、 to 有單復(fù)數(shù)及時(shí)態(tài)的變化,must無人稱、時(shí)態(tài)、數(shù)的變化。單元同步語法強(qiáng)化訓(xùn)練 一、單項(xiàng)選擇。1_I have some bananas?Yes,please.ACan BNeed CMust DShould2Can you come to Susans party?Sorry,I_look after my grandma.Aam Bhave to Ccan Ddo3Can you come and play baseball games with us?_.I must study for a test.AYes,I can BYes,I doCI am afraid not DSur
5、e,Id loveA B C 4Will you go to museum with me this afternoon?Sorry,_.My aunt is coming to see me.AI dont BI cantCI mustnt DI am not5_you come to my party on Sunday?Sure,Id love to.AMust BCan CShould DNeedB B 二、按要求完成句子。6They can go to the tennis game.(改為一般疑問句)_ _go to the tennis game?7Can you play so
6、ccer with me this afternoon?(作肯定回答)Sure,_ _ _.8Can she go there by taxi?(作否定回答)No,_ _.9He has to go_to_the_doctor(對(duì)畫線部分提問)_ _he have to_?10They can come to our school on_Tuesday(對(duì)畫線部分提問)_ _they come to your school?Can they Id love/like to she cant What does do When can 1invite 動(dòng)詞,意為“邀請(qǐng)”;其名詞形式是invita
7、tion。常用短語:invite sb.to地點(diǎn),意為“邀請(qǐng)某人到某地”。invite sb.to do sth.意為“邀請(qǐng)某人做某事”。2accept 動(dòng)詞,意為“收到;接受”,強(qiáng)調(diào)主觀上愿意接受。3refuse 動(dòng)詞,意為“拒絕”,常用短語:refuse sb./sth.拒絕某人/某物refuse to do sth.拒絕做某事從方框內(nèi)選詞并用其適當(dāng)形式填空。1Thank you for_me to your birthday party,but I am busy next week.2He _to do his homework,so his father was angry.3Why didnt you_my best wishes?I really loved you.inviting refused accept 安全小貼上課間活動(dòng)注意安全