語(yǔ)法知識(shí)考點(diǎn)基本會(huì)出現(xiàn)在英語(yǔ)考試以及練習(xí)題的任意題型當(dāng)中，所以說(shuō)學(xué)習(xí)好英語(yǔ)語(yǔ)法是非常重要的，下面是小編給大家?guī)?lái)的八年級(jí)英語(yǔ)必考語(yǔ)法知識(shí)點(diǎn)，希望能夠幫助到大家!

　　八年級(jí)英語(yǔ)必考語(yǔ)法點(diǎn)梳理+練習(xí)

　　情態(tài)動(dòng)詞 should和could

　　【運(yùn)用】

　?、? 根據(jù)漢語(yǔ)意思完成下列句子，每空一詞。

　　1. 你應(yīng)該幫媽媽做家務(wù)。

　　You ________ ________ your mother with housework.

　　2. 我能參加?；@球隊(duì)的選拔活動(dòng)嗎?

　　________ I ________ ________ for the school basketball team?

　　3. 你不應(yīng)該總拿自己和別人比較。

　　You ________ always ________ yourself with others.

　　4. 我不在時(shí)，能請(qǐng)你照顧一下我兒子嗎?

　　________ ________ ________ take care of my son while I’m away?

　　5. —— 我頭疼。我應(yīng)該去看醫(yī)生嗎?

　　—— 是的，你應(yīng)該去。

　　— I have a headache. ________ ________ ________ to see a doctor?

　　— Yes, you ________.

　　Ⅱ. 按要求改寫下列句子，每空一詞。

　　1. You should drink some ice water. (改為否定句)

　　You ________ drink ________ ice water.

　　2. Could I borrow your new bike? (作肯定回答)

　　________, you ________. But you can’t lend it to others.

　　3. You should take your temperature first. (改為一般疑問(wèn)句)

　　________ I ________ my temperature first?

　　4. Could you please open the windows? (改為否定句)

　　Could you please ________ ________ the windows?

　　5. Jenny should see the doctor and get an X-ray. (對(duì)劃線部分提問(wèn))

　　________ ________ Jenny ________?

　　【梳理】

　　should后接動(dòng)詞原形，其否定形式是should not，?？s寫為shouldn’t。

　　含should的肯定句變?yōu)橐话阋蓡?wèn)句時(shí)，應(yīng)將should提到句首，其肯定回答為“Yes, 主語(yǔ)+should”，否定回答為“No, 主語(yǔ)+shouldn’t”。

　　含should的句子常表示責(zé)任、義務(wù)或提出建議等。

　　Could you please …?意為“請(qǐng)你……好嗎?”表示請(qǐng)求對(duì)方做某事，其肯定回答常用Yes, sure / Certainly / Of course等，否定回答常用Sorry, I can’t / Sorry, I’m afraid not / I have to …等。

　　Could you please …?的否定形式是在please后面加not。另外，Could I / we …?意為“我/我們可以……嗎?”表示請(qǐng)求得到對(duì)方的允許，其肯定回答常用Yes, you can /Yes, sure等，否定回答常用Sorry / No, you can’t等。

　　【答案】

　?、? 1. should help

　　2. Could; try out

　　3. shouldn’t; compare

　　4. Could you please

　　5. Should I go; should

　?、? 1. shouldn’t; any

　　2. Yes; can

　　3. Should; take

　　4. not open

　　5. What should; do

　　動(dòng)詞不定式

　　【運(yùn)用】

　　用所給動(dòng)詞的適當(dāng)形式填空。

　　1. It took the workers ten months ________ (build) this bridge.

　　2. Peter offered ________(teach) them how to swim.

　　3. Did you hear Mom and Dad ________(go) out just now?

　　4. He studied hard ________(get) better grades in the final exams.

　　5. We should not let this kind of thing ________(happen) again.

　　6. The Internet makes it possible for many people _______(work) at home.

　　【梳理】

　　動(dòng)詞不定式由“to+動(dòng)詞原形”構(gòu)成，在句中可作賓語(yǔ)、賓語(yǔ)補(bǔ)足語(yǔ)、狀語(yǔ)和主語(yǔ)等。

　　動(dòng)詞不定式可在句中作動(dòng)詞d e c i d e , refuse, hope, offer等的賓語(yǔ)。

　　動(dòng)詞不定式可在句中作賓語(yǔ)補(bǔ)足語(yǔ)，這類動(dòng)詞有advise, invite, ask等;動(dòng)詞不定式作使役動(dòng)詞和感官動(dòng)詞的賓語(yǔ)補(bǔ)足語(yǔ)時(shí)，應(yīng)省略to。

　　動(dòng)詞不定式可在句中作目的狀語(yǔ)。

　　動(dòng)詞不定式可在句中作主語(yǔ)，常用it作形式主語(yǔ)，真正的主語(yǔ)(即動(dòng)詞不定式)放在句尾。

　　【答案】

　　1. to build

　　2. to teach

　　3. go

　　4. to get

　　5. happen

　　6. to work

　　讓步、目的和時(shí)間狀語(yǔ)從句

　　【運(yùn)用】

　　將下列句子翻譯成英語(yǔ)。

　　1. 盡管陽(yáng)光燦爛，但天氣不暖和。

　　2. 我會(huì)把鑰匙給你，這樣你就可以自己進(jìn)去。

　　3. 孩子們跟著音樂(lè)跳舞直到音樂(lè)停止。

　　4. 直到離開(kāi)學(xué)校，他們才意識(shí)到學(xué)習(xí)的重要。

　　【梳理】

　　讓步狀語(yǔ)從句常由although, though等詞引導(dǎo)，一般情況下，although可以與though互換使用，但二者不能與but同時(shí)出現(xiàn)在一個(gè)句子中。

　　目的狀語(yǔ)從句常由so that, in order that等短語(yǔ)引導(dǎo)。

　　時(shí)間狀語(yǔ)從句常由until, when, while等詞引導(dǎo)。until用在肯定句中，意為“直到……為止”，常與延續(xù)性動(dòng)詞連用;until用在否定句中，意為“直到……才……”，常與終止性動(dòng)詞連用。

　　【答案】

　　1. Although / Though the sun is shining, it isn’t warm.

　　2. I’ll give you the key so that you can get yourself in.

　　3. Children danced to the music until it stopped.

　　4. They didn’t realize the importance of study until they left school.

　　過(guò)去進(jìn)行時(shí)

　　【運(yùn)用】

　?、? 單項(xiàng)選擇。

　　( ) 1. — I called you this morning, but nobody answered.

　　— I ________ flowers in my garden at that time.

　　A. watered

　　B. was watering

　　C. water

　　D. am watering

　　( ) 2. My brother ________ the Indian film Dangal when I phoned him yesterday.

　　A. watches

　　B. has watched

　　C. is watching

　　D. was watching

　　( ) 3. — You look tired. What’s wrong with you?

　　— I stayed up last night. I ________ my speech from eight o’clock to midnight.

　　A. practiced

　　B. am practicing

　　C. was practicing

　　D. has practiced

　　Ⅱ. 按要求改寫下列句子，每空一詞。

　　1. He read a magazine last night. (用at this time last night改寫句子)

　　He ________ ________ a magazine at this time last night.

　　2. Linda was sleeping when Susan arrived. (改為否定句)

　　Linda _______ _______ when Susan arrived.

　　3. They were playing basketball at 4:00 pm yesterday. (改為一般疑問(wèn)句)

　　________ they ________ basketball at 4:00 pm yesterday?

　　4. She was making dinner when her sister was cleaning the room. (對(duì)劃線部分提問(wèn))

　　________ ________ she ________ when her sister was cleaning the room?

　　【梳理】

　　過(guò)去進(jìn)行時(shí)由“was / were + V-ing形式”構(gòu)成，表示過(guò)去某個(gè)時(shí)刻或某一時(shí)間段正在進(jìn)行的動(dòng)作。

　　過(guò)去進(jìn)行時(shí)常與表示過(guò)去某一特定時(shí)間的狀語(yǔ)連用，如at that time, at this time yesterday, all night, from 8 to 10 this morning等，也可與when / while引導(dǎo)的時(shí)間狀語(yǔ)從句連用。

　　【答案】

　?、? 1–3 BDC

　　Ⅱ. 1. was reading

　　2. wasn’t sleeping

　　3. Were; playing

　　4. What was; doing