人教版八年級(jí)英語(yǔ)上冊(cè)《Can you come to my party?》SectionA PPT教學(xué)課件(第3課時(shí))，共36頁(yè)。
Objectives
To learn to use “Can you/he/they…?”to make invitations.
To use the following structure to talk about obligations: I might have to/must…
To learn how to communicate with others politely.
Review
Hey, Anna, can you come to my birthday party on Saturday? …
Oh, Sam! I remember we went bike riding last fall when …
Can you play chess with me tomorrow afternoon?
Sure. I’d love to.
I’m afraid not. I have the flu.
Grammar Focus
Can you come to my party on Saturday?
Sure, I’d love to./Sorry, I must study for a math test.
Can you go to the movies tomorrow night?
Sure. That sounds great.
I’m afraid not. I have the flu.
Can he go to the party?
No, he can’t. He has to help his parents.
Can she go to the baseball game?
No. she’s not available. She must go to the doctor.
Can they go to the movies?
No, they’re not free. They might have to meet their friends.
情態(tài)動(dòng)詞主要有：may/might, can/could, must, have to, shall/should, will/would, ought to, need, dare, used to
現(xiàn)在我們來(lái)著重學(xué)習(xí)情態(tài)動(dòng)詞can 以及
have to 的用法。
其特征主要有：
情態(tài)動(dòng)詞 can 的基本用法
1. 情態(tài)動(dòng)詞 can 有一定的詞義，但不能獨(dú)立存在，它必須與動(dòng)詞原形一起構(gòu)成謂語(yǔ)。情態(tài)動(dòng)詞 can 沒(méi)有人稱和數(shù)的變化。其具體用法如下:
表示“能、會(huì)”指腦力或體力方面的“能力”。如:
► I can speak Japanese. 我會(huì)講日語(yǔ)。
► Frank can swim but I can’t. 佛蘭克會(huì)游泳, 但我不會(huì)。
2. 表示“可能”，常用于否定句或疑問(wèn)句中，指某種可能性。例如：
► My cousin can’t be in this city. He is in Korea now.
我堂兄不可能在這個(gè)城市里。他在韓國(guó)呢。
► Can he come to our club today, please?
請(qǐng)問(wèn)他今天能來(lái)我們俱樂(lè)部嗎？
3. 表示“可以”，常用于口語(yǔ)中，指許可或請(qǐng)求做某事
► Can I ask you a question? 我可以問(wèn)你一個(gè)問(wèn)題嗎？
► You can bring something to eat. 你可以帶些吃的。
can為情態(tài)動(dòng)詞, 在本單元中表示請(qǐng)求，用于發(fā)出邀請(qǐng)，后跟動(dòng)詞原形。當(dāng)同意接受對(duì)方的邀請(qǐng)時(shí)，常用Sure, I’d love to. / Certainly. /Of course.等來(lái)回答；若不接受，常用Sorry等來(lái)有禮貌地拒絕，一般情況下需要說(shuō)明不能接受邀請(qǐng)的原因以表示歉意。
► —Can you come to my birthday party tomorrow？
明天你來(lái)參加我的生日聚會(huì)，好嗎？
—Sorry, I can’t. I am going to visit my grandpa.
很抱歉，我來(lái)不了，我要去看我爺爺。
have to 的用法
1. have (has) to + 動(dòng)詞原形
have (has) to 后面要用動(dòng)詞原形。當(dāng)主語(yǔ)為第三人稱單數(shù)時(shí)用 has to，當(dāng)句子是過(guò)去時(shí)用 had to。
► We have to go home now.
我們不得不現(xiàn)在就回家。
► He has to work on Sunday.
他不得不在周日工作。
► I had to do much housework last Sunday.
上周日我不得不做很多作業(yè)。
2. have to 的否定句句型：
主語(yǔ) +don’t/didn’t/doesn’t won’t +have to + 動(dòng)詞原形
► You don’t have to walk so fast.
你不必走那么快。
► He will not have to buy a new coat next year.
明年他沒(méi)必要買(mǎi)新外衣了。
3. have to 的疑問(wèn)句句型：
Do/Does/Did/Will + 主語(yǔ) + have to + 動(dòng)詞原形
3. have to的意思是“必須、不得不”, 往往強(qiáng)調(diào)由于客觀原因
而必須做某事。 have to 后接動(dòng)詞原形；have to有人稱、數(shù)和
時(shí)態(tài)的變化, 其第三人稱單數(shù)形式為has to, 其疑問(wèn)形式和否定
形式要借助于助動(dòng)詞do或does來(lái)完成。例如：
► We have to look after our sister at home.
我們不得不在家照顧我們的妹妹。
► Does he have to get up early tomorrow morning?
明天早上他必須早起嗎？
► I don’t have to stay at home today. 今天我不必待在家里。
Homework
Write an invitation based on the following information.
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