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出要求；用于否定句中表示不允許?！咀⒁狻縞an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，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)樘旌诹恕ou must do it yourself.你必須自己做。have 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 DSure，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 soccer 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invitation。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