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《Celebration》高一英語(yǔ)教案

時(shí)間:2022-10-09 19:48:26 教案 我要投稿
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《Celebration》高一英語(yǔ)教案

  Lesson3 Grammar

《Celebration》高一英語(yǔ)教案

  Tips:All things in their being are good for something.(天生我材必有用)

  Learning aim: learn the use of the modal verbs have to /not have to , can/can’t, ought to /ought not to

  Learning methods: observe----learn-----summarize------use

  Learning steps:

  StepI: Underline all the following words in the texts and translate them.

  have to , don’t have to, ought to, ought not to, can’t,can

  StepII: Match the verbs to their meanings.(A級(jí))

  1 have to a) not necessary

  2 don’t have to b) necessary

  3 can c) not allowed/not possible

  4 can’t d) allowed/ possible

  5 ought to e) not advisable

  6 ought not to f) advisable

  StepIII:Transtrate the following sentences.(B級(jí))

  1.1)I can’t go out now, I have to look after my baby .

  ______________________________________

  2)I must find a job,my parents can’t support me any longer.

  _____________________________________________

  3)— Must we hand in our exercise books today?

  — Yes, you must. (No, you don’t have to/need’t.)

  ________________________________________________

  總結(jié):must 和have to表示___________,但must表示___________觀,have to表示_________觀(如例句1,2所示)

  讀一讀,記一記:

  must與have to有下列幾點(diǎn)不同:

 、 must表示的是說(shuō)話人的主觀看法,而have to則往往強(qiáng)調(diào)客觀需要。

  The play is not interesting. I really must go now.

  I had to work when I was your age.

 、 must與have to 的時(shí)態(tài)差別: have有時(shí)態(tài)的變化,如三單has, 過(guò)去時(shí)had ,表示 客觀上的不得不,能與所有 時(shí)態(tài)一起。must為情態(tài)動(dòng)詞, 無(wú)時(shí)態(tài)的變化 , 表示主觀上的必須, 需要。

  ③ 二者的否定意義不大相同。如:

  You mustn't go. 你可不要去。

  You don't have to go. 你不必去。

 、 詢問(wèn)對(duì)方的意愿時(shí)應(yīng)用must。如:

  Must I clean all the room?

  2 1)Can you speak English?

  __________________________________________________ can表示能力(如體力和腦力方面),意為“__________”等can表示能力時(shí),還可用be able to代替。如:

  I'll not be able to come this afternoon.

  2)表示請(qǐng)求或允許,多用在口語(yǔ)中,意為“__________”等。

  — Can/Could I go now?

  — Yes, you can.(回答語(yǔ)中不能用could)

  3) 表示驚異、懷疑、不相信的態(tài)度。(主要用在否定句、疑問(wèn)句或驚嘆句中)

  Can this be true? ______________________

  How can you be so careless! ___________________

  This cannot be done by him. __________________

  4)在變否定句時(shí),直接在后加上“not”,可縮寫(xiě)成_________或___________, 但不能寫(xiě)成cann’t。例如:

  (變成否定句) He can swim. → _______________________

  3 ought意思是______________后面跟帶有 to 的動(dòng)詞不定式否定式為_(kāi)________________。(C級(jí))

  You ought to read these books if you want to know how to repair the motorcar.

  ____________________________________________

  You ought to bring the child here.

  _____________________________________________

  You ought not to walk alone at night. _____________________________________________

  注意: ought to和should的區(qū)別:

  1.ought to語(yǔ)氣略強(qiáng)。 2.should較常用。

  3.ought to在美國(guó)英語(yǔ)中用的很少,而should卻相當(dāng)常用。

  4.ought to屬正式用語(yǔ)。

  練一練:(C級(jí))

  1The man in the office____________be Mr. Black because he went home

  just now.

  A. mustn’t B. may not C. can’t D. needn’t

  2---Can you go surfing with us this afternoon?

  ----I’d like to , but I ________ look after my sister at home , because my mother is ill.

  A. need B. must C. have to D. should

  3----Can I take this book out of the reading room?

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