人教版八年级英语上第三四单元知识重点

Unit 3 I’m more outgoing than my sister.

1.形容词和副词有三个等级:原级,比较级,最高级.

(1)规则变化

a. 一般在词尾加st或est. high-higher-highest

b.以e结尾的,加r或st. fine-finer-finest

c.以辅音字母加y结尾的,变y为i,再加e r或est. funny-funnier-funniest

d.以重读闭音节结尾,末尾只有1个元音字母+1个辅音字母(除w, y),先双写这个辅音字母,

再加e r或est. big-bigger-biggest

e. 部分双音节和多音节词,在词前加more或most. tired-more tired-most fired,

beautiful-more beautiful-most beautiful

(2) 比较级的用法: 用于两者作比较, 表示其中一个比另一个“更---”，在比较级前，可以

用much(---得多), even(更加), a lot(得多), a little(---一点点)

He is taller than me.

He is much taller(高得多) than me.

He is a little taller(高一点点) than me.

(3)表示两者在某一方面相同时(A像B一样),用as+形容词或副词原级+as.

I think science is as important as math.

Tom runs as fast as Jack.

(4) 表示A方在某一方面不如B方时(A不如B),用not as/so+形容词或副词原级+as.

Math is not as/so interesting as Chinese.

=Math is less interesting than Chinese.数学不如语文有趣.

=Chinese is more interesting than math.语文比数学更有趣.

2. both两者都(1)both+(限定词)+可数名词复数,作主语时, 谓语动词用复数.

(2)both A and B,A和B都,谓语用复数.

(3)both位于连系动词,助动词,情态动词之后,行为动词之前.

either两者中的任何一个, either+可数名词单数,作主语时, 谓语动词用单数.

neither两者都不, neither+可数名词单数,作主语时,谓语动词用单数.

My aunt and uncle are both doctors.

Either boy wants to buy the bicycle.

Neither girl is my friends.

3.由形容词加ly构成的副词的比较级,都是在前面加more.

clear-clearly-more clearly, quiet-quietly-more quietly, quick-quickly-more quickly,

loud-loudly-more loudly

4.same相同的,常用the same, 如果same前面已经有this, those等词,就不再要the,

the same as和---相同

different不同的,其后名词要用复数形式.be different from.和---不同.

My new bike is the same as yours.

We are in different classes.

This sweater is different from that me.

5.care (1)作及物动词,在乎,介意,关心,后接宾语从句.

(2) 作不及物动词, care about/for在乎,介意,关心,后接短语.

(3) 作名词, take care of=look after照顾, careful形容词,小心的, carefully副词,小心地

He didn’t care(在乎) whether(是否) she came or not.

We should care about(关心)other people’s problems.

Who is going to care for(照顾) our sick friend?

6.as long as只要,引导条件状语从句.

You don’t need a lot of friends as long as they’re good.

7.difference可数名词,或不可数名词,不同,差异,区别, make a difference有差别/影响,起重

要作用. make no difference没有差别,没有影响,不起重要作用

The sea air has made a difference to her health.

海上的空气改善了她的健康状况.

She makes no difference between her two sons.

她对两面三刀个儿子一视同仁.

8.same相同的, similar相似的, be similar to与---想像, similar后接介词in,在---方面想像

My pinions(看法) are similar to his. We have similar taste in music.

9.That’s why+从句,那是为什么----

That’s why I like reading books and I study harder in class.

10.bring out使显现,使表现出. bring out the best/ worst in sb把某人最好(最坏)的面表现出来

My best friend helps to bring out the best in me.

Unit 4 What’s the best movie theater?

1.形容词和副词最高级:用于三者或三者以上作比较,意为“最----- ’’,后面可用of, in 短语

来表示比较范围.形容词最高级前必须加定冠词the, 副词最高级前的the可以省去.

Tom is the tallest in our class. =Tom is taller than any other student in our class.

She sings (the) most beautifully of the three.

2. close (1)名词,结束.

He soon brought the meeting to a close.他很快就结束了会议.

(2)形容词,亲近的,接近的.

Although Tom is from England, he has some close friends in China.

(3)动词,关上.

Please close the door.

(4) be close to 离------近

I don’t need to get up early, because my home is close to our school.

(5) closed形容词,关着的

The shop was closed when I got there.

3. so far到目前为止How do you like it so far?

4. What do you think of the song?

=How do you like the song?

=How do you feel about the song?

你觉得这首歌怎么样?

5. pretty (1) 副词,非常,相当

It’s pretty cold today.

(2)形容词,漂亮的