人教版八年級英語上冊《Can you come to my party?》SectionA PPT教學課件(第3課時)，共36頁。
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.
情態動詞主要有：may/might, can/could, must, have to, shall/should, will/would, ought to, need, dare, used to
現在我們來著重學習情態動詞can 以及
have to 的用法。
其特征主要有：
情態動詞 can 的基本用法
1. 情態動詞 can 有一定的詞義，但不能獨立存在，它必須與動詞原形一起構成謂語。情態動詞 can 沒有人稱和數的變化。其具體用法如下:
表示“能、會”指腦力或體力方面的“能力”。如:
► I can speak Japanese. 我會講日語。
► Frank can swim but I can’t. 佛蘭克會游泳, 但我不會。
2. 表示“可能”，常用于否定句或疑問句中，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城市里。他在韓國呢。
► Can he come to our club today, please?
請問他今天能來我們俱樂部嗎？
3. 表示“可以”，常用于口語中，指許可或請求做某事
► Can I ask you a question? 我可以問你一個問題嗎？
► You can bring something to eat. 你可以帶些吃的。
can為情態動詞, 在本單元中表示請求，用于發出邀請，后跟動詞原形。當同意接受對方的邀請時，常用Sure, I’d love to. / Certainly. /Of course.等來回答；若不接受，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的原因以表示歉意。
► —Can you come to my birthday party tomorrow？
明天你來參加我的生日聚會，好嗎？
—Sorry, I can’t. I am going to visit my grandpa.
很抱歉，我來不了，我要去看我爺爺。
have to 的用法
1. have (has) to + 動詞原形
have (has) to 后面要用動詞原形。當主語為第三人稱單數時用 has to，當句子是過去時用 had to。
► We have to go home now.
我們不得不現在就回家。
► 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。
2. have to 的否定句句型：
主語 +don’t/didn’t/doesn’t won’t +have to + 動詞原形
► 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.
明年他沒必要買新外衣了。
3. have to 的疑問句句型：
Do/Does/Did/Will + 主語 + have to + 動詞原形
3. have to的意思是“必須、不得不”, 往往強調由于客觀原因
而必須做某事。 have to 后接動詞原形；have to有人稱、數和
時態的變化, 其第三人稱單數形式為has to, 其疑問形式和否定
形式要借助于助動詞do或does來完成。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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