八下知识点

人教版八年级下册英语 核心知识点汇总

一、重点语法（考试核心）

1. 情态动词 could

1）表示过去能够（can过去式）

2）委婉提出请求：Could you please…? 肯定回答：Sure./Of course.

⚠️ 注意：could表委婉请求≠过去时，回答不用could，用can。

2. 提建议句型

- Why not do…? = Why don’t you do…?

- What about doing…?

- You should do… 你应该……

3. 不定代词（Unit 2）

someone, anyone, everyone, something, anything

规则：形容词放后面 something important

4. 过去进行时（Unit 5）

结构：was / were + doing

含义：过去某个时刻正在做某事

标志词：at 8:00 last night, then, at that time

例句：I was reading at 9 p.m. yesterday.

5. 状语从句

(1) 时间状语从句（when / while）

- when：后可接短暂性动词/延续动词

- while：只能接延续性动词（进行时居多）

(2) 条件状语从句（if，如果）

主将从现：主句将来时，if从句一般现在时

If it rains tomorrow, we will stay at home.

6. 现在完成时（全书最难！Unit 8–10）

✅ 结构：have/has + 动词过去分词

标志：already, yet, ever, never, since, for, so far

区分：

- for + 一段时间

- since + 时间点/过去句子

⚠️ 短暂性动词不能和for/since连用

例：buy → have；leave → be away；die → be dead

二、必考短语

Unit1 What’s the matter?

1. have a fever 发烧

2. have a stomachache 胃痛

3. lie down 躺下

4. take one’s temperature 量体温

5. take a break 休息

6. get off 下车

7. to one’s surprise 使……惊讶

8. right away 立刻

Unit2 I’ll help to clean up the parks

1. clean up 打扫干净

2. cheer up 使振奋

3. give out 分发

4. come up with 想出

5. put off 推迟

6. take after （外貌、性格）像

7. fix up 修理

8. give away 赠送

Unit3 Could you please clean your room?

1. take out the rubbish 倒垃圾

2. fold the clothes 叠衣服

3. sweep the floor 扫地

4. depend on 依靠

5. take care of = look after 照顾

6. as soon as 一……就

Unit4 Why don’t you talk to your parents?

1. allow sb. to do 允许某人做

2. hang out 闲逛

3. work out 解决；进展

4. get on with 和睦相处

5. compete with 和……竞争

6. compare…with… 把……和……比较

Unit5 What were you doing when the rainstorm came?

1. pick up (the phone) 接电话

2. fall asleep 入睡

3. die down 逐渐变弱

4. in a mess 一团糟

5. break apart 分裂

Unit6 An old man tried to move the mountains

1. try to do 尽力做

2. give up doing 放弃做

3. instead of 代替

4. turn…into 把……变成

5. get married 结婚

Unit7 What’s the highest mountain in the world?

形容词/副词最高级

1. as…as 和……一样

2. feel free to do 随意做

3. take in 吸入

4. risk one’s life 冒着生命危险

5. even though 即使

Unit8 Have you read Treasure Island yet?

1. hurry up 赶快

2. full of 充满

3. grow up 长大

4. cut down 砍倒

Unit9 Have you ever been to a museum?

1. have been to 去过（已回来）

2. have gone to 去了（还没回）

3. have ever been to 曾经去过

4. take the subway 坐地铁

Unit10 I’ve had this bike for three years

1. check out 查看

2. board game 棋类游戏

3. part with 舍弃

4. as for 至于

5. to be honest 说实话

三、重点句型

1. What’s the matter with sb.? = What’s wrong with sb.? 某人怎么了？

2. Could you please not do sth.? 请你不要做……好吗？

3. You should (not) do… 你应该/不应该……

4. Why don’t you do sth.? 你为什么不……？

5. While I was reading, my sister was sleeping.

正当我看书时，妹妹在睡觉。

6. Have you ever been to…? 你曾经去过……吗？

7. I have lived here for 5 years. 我在这住5年了。

四、易混易错点

1. too much + 不可数名词；much too + 形容词

2. spend / take / cost / pay

- spend：人作主语 spend time/money on sth./(in) doing

- take：it takes sb. time to do

- cost：物作主语

- pay：人 pay money for sth.

3. 现在完成时 不能搭配过去时间（yesterday, last week）

❌ I have seen him yesterday.

✅ I saw him yesterday.