英語(yǔ)作為一門主要的學(xué)科，八下英語(yǔ)unit8sectiona 3a的知識(shí)點(diǎn)你都掌握了嗎?接下來(lái)學(xué)習(xí)啦小編為你整理了八下英語(yǔ)unit8sectiona 3a知識(shí)點(diǎn)，一起來(lái)看看吧。

　　八下英語(yǔ)unit8sectiona 3a知識(shí)要點(diǎn)

　　1、Section A重點(diǎn)詞匯(milk shake,turn on,cut up,pour...into,honey,spoon,add,finally,salt,

　　sugar,cheese,corn,machine,dig,hole)

　　2、重點(diǎn)句型(①-How many bananas do we need? -We need three bananas.②-How much yogurt do we need? -We need one cup of yogurt.③Turn on the blender.④Cut up the bananas.)

　　3、可數(shù)名詞和不可數(shù)名詞用法

　　4、祈使句用法

　　5、turn on及相關(guān)詞組用法

　　八下英語(yǔ)unit8sectiona 3a知識(shí)點(diǎn)例題精講

　　例1. 可數(shù)名詞與不可數(shù)名詞

　?、倏蓴?shù)名詞，單數(shù)形式在前面加a\an;不可數(shù)名詞前面不加a, an,不能用基數(shù)詞連用，但可以 用 a little, much, some, a lot of, lots of, enough, most等修飾。

　?、谛枰?jì)量時(shí)，可以在前面加計(jì)量詞組=數(shù)詞\冠詞+量詞+of +不可數(shù)名詞：

　　a spoon of tea a cup of yogurt a bottle of a piece of a bag of

　?、奂瓤尚揎椏蓴?shù)名詞與不可數(shù)名詞的詞有： a lot of =lots of , some, any(用在疑問(wèn)句或者否定句) ④可數(shù)名詞量的提問(wèn)：How many+可數(shù)名詞復(fù)數(shù)+ do we need?

　　不可數(shù)名詞量的提問(wèn)：How much+不可數(shù)名詞+do we need?

　　例2. 祈使句

　　定義：祈使句指的是表示命令、請(qǐng)求、建議或勸告的句子。其主語(yǔ)you常省略，謂語(yǔ)動(dòng)詞用原形， 句末用感嘆號(hào)或句號(hào)，讀降調(diào)。

　　結(jié)構(gòu)：1. 肯定的祈使句：動(dòng)詞原形+其他 如：Stand up, please. Be careful!

　　2. 否定的祈使句: 1). Don't + 動(dòng)詞原形 Don’t laugh at others.

　　2). Never do sth. Never do that again!

　　3). No + v-ing/n. No smoking! No noise, please.

　　4). Let’s not do sth. Let’s not waste time.

　　5). Don’t let sb. do sth. Don’t let them make any noise.

　　祈使句的考點(diǎn)：A: Don’t forget to turn off the light. B: OK. I won’t.

　　A: Don’t play on the road. B: Sorry. I won’t.

　　A: Remember to return it as soon as possible B: OK./All right./I will.

　　例3. How do you make a banana milk shake? 你怎樣制作一份香蕉奶昔?

　　shake/shook

　　(n)搖動(dòng);抖動(dòng)： Give the bottle a good shake. 好好地?fù)u一下瓶子。 (v)(使)搖動(dòng)/顫抖：Shake the bottle before drinking.

　　抖落: He shook the snow off his coat at the door.

　　搭配用法：shake hands 握手 shake one’s head 搖頭 for a shake 一瞬間

　　例4. Turn on the blender. 打開(kāi)攪拌器。

　　turn on：打開(kāi)(電、煤氣、水等)

　　Will you please turn on the light? It’s too dark. turn off: 關(guān)掉(電、煤氣、水等) Please turn the light off when you leave the building. turn up: 調(diào)高(音量等)I can’t hear clearly, please turn up the radio. 出現(xiàn) If he doesn’t turn up in ten minutes, we’ll have to go.

　　調(diào)低(音量等)Please turn down the TV when I’m talking on the phone. 拒絕 She turned down his invitation.

　　例5. cut up the bananas. 把香蕉切碎。

　　cut：(n.)切口;傷口;(v.) 切，割，剪，砍，削等

　　cut… into… 把…切成… Cut the turkey into pieces.

　　cut off 切斷;中斷 He almost cut off his finger while working. cut up 切碎;剁碎 Cut the onion up in small pieces.

　　傷害;折磨 He was cut up badly when he fell off his bike.

　　cut down 砍倒;削減 They cut down the old trees in order to build a new factory.

　　例6. How much yogurt do we need? B: We need one cup of yogurt.

　　1). how many: 多少 + 可數(shù)名詞 How many watermelons do you need?

　　how much 多少 + 不可數(shù)名詞 How much cheese/sugar do we need? 多少錢= What’d the price of…? How much is the butter?

　　(n.) There’s no need for you to hurry. 你沒(méi)有必要慌張。 Sb. need sth. She needs help.

　　(v.實(shí)) Sb. need to do sth. You need to get it back tomorrow.

　　需要; Sth. need doing = sth. need to be done. The bike needs repairing.

　　必須 (v.情) 常用于否定和疑問(wèn): You needn’t tell me. 你沒(méi)有必要告訴我。 Need I go there? 搭配用法：in need of… 需要… at need在緊急時(shí)

　　例7. 在描述一件事情的先后順序時(shí)，恰當(dāng)?shù)厥褂酶痹~first，next，then 和 finally，既能使說(shuō)話人喘口氣，又能使聽(tīng)話者感到句子的連貫性，通常用祈使句。 first 意為“首先”，放于句首或句尾。

　　如：First you look up(查詢) the word in the dictionary. 首先你從詞典里查查這個(gè)詞。 next 意為“其次”，它可放于句首、句中和句尾。

　　如： I don’t know what to do next. 我不知道下一步干什么。 then 意為“然后”，用法與next大體相同。

　　如：Then,cut up the vegetables. 然后，把蔬菜切碎。 finally 意為“最后”，通常放于開(kāi)頭。

　　如：Finally, we decided to go on foot. 最后，我們決定步行去。

　　八下英語(yǔ)unit8sectiona 3a知識(shí)習(xí)題

　　可數(shù)名詞與不可數(shù)名詞------用所給名詞的適當(dāng)形式填空。

　　1. How many________(sheep) are there on the hill?

　　2. There is some________(food) in the basket.

　　3. The baby has only two________(tooth) now.

　　4. There is a lot of________(water) in the bottle.

　　5. There are five________(people ) in his family.

　　6. Let's take________(photo), OK?

　　7. I have lots of________(tomato) here.

　　8. The________(leaf) on the tree turn-yellow.

　　9. The________(child) are playing games on the playground now.

　　10. Their________(dictionary) look new.

　　11. I see you have a few white________(hair).

　　12. They are________(woman) doctors.

　　13. Can you give me some bottles of ____ (orange), please?

　　14. There are many________(fox) in the picture.

　　15. I would like some apple________(juice). I am very thirsty.

　　根據(jù)句意，用括號(hào)中所給單詞的適當(dāng)形式填空。

　　1. Turn on the b______ to make orange juice. 2. P______ the oranges before we eat them 3. I like ______ (tomato) and ______ (chicken).

　　4. They need yogurt. (改為否定句) They _______ _______ yogurt. 對(duì)畫(huà)線部分提問(wèn)) _______ _______ ________ do you need? 6. Play the piano like this. (改為否定句) _______ _______the piano like this

　　1. How many ______ (dictionary) do you have?

　　2. I have three _______( watch ).

　　3. There are some _______( orange) on the table.

　　4. I like _______(tomato) and _______ ( chicken).

　　5. How much _______( honey ) do we need?

　　6. Tina, let’s _________(make) fruit salad.

　　7. Oh, it ______(rain) last night, so the ground is wet now.

　　8. Tom is a little _________ ( strong) than Mike.

　　9. I think English is ________________(important) than any other subject.

　　10. My mother ________( take) the bus to work every day.

　　11. 請(qǐng)把酸奶倒進(jìn)杯子里。 Please _______ the yogurt _______ the glass.

　　12. 然后放入兩湯匙檸檬和一杯酸奶。____ put in ____ ______ ____ lemon and ___ _____ ____ yogurt.

　　13. 我不知道怎么玩這個(gè)游戲。 I don’t know _______ ______ play the game.

　　14. 請(qǐng)放些雞肉片在這個(gè)三明治上。Please ____ some chicken slices _______ the sandwich.

　　15. 我們需要多少食鹽? How ______ ______ do we need?