广州新版--八年级上册Unit-3--Computers

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Unit 3 Computers

课文重难点详解

1.In the 1940s, the first computers were bigger than cars.

in the 1940s意为“在20世纪40年代”,例:在20世纪50年代

表示在某个年代初期或末期,可以在年份前加early或late. 例:in the early 1940s

2.You may be unaware of them.

be unaware of 意为“未察觉,没有意识到”

译:那个男孩没有意识到危险。

3.There is probably one inside your TV or washing machine.

one 此处用作代词,用于泛指前面提到过的名词。

辨析:one 和it

例:The banana pie tastes delicious. Could I have another ?

A one

B it

C this

D that

4.You depend on computers more than you realize.

depend on意为“依靠,指望”,主语可以是人,也可以是物,其含义有所不同。人依靠

depend on

物取决于

dependent adj. 依赖的,反义词:independent “独立的” depend on = be dependent on

译:she depends on us to help her.

Our plan depends on the weather.

puters almost never give wrong answers.

almost never = hardly 意为“几乎不”

辨析:hardly和hard

6. However, one day computers may be able to do a better job than human beings.

be able to 意为“能够”,后接动词原形。

7. Will we have nothing to do?

to do为动词不定式,此处用来修饰nothing,如果不定式中的动词是不及物动词,需要带上必要的介词。

例:Do you want something to drink?

There is a warm clothes to live in.

例:---Why don’t you go out to play, Rose?

---I’m afraid I can’t. I have much homework .

A do

B does

C doing

D to do

8. What were the first computers like?

What + be + 主语+ like? 意为“......怎么样?”, like 是介词,意为“像,相似”译:今天天气怎么样?

辨析:what’s sb like, what does sb like 与what does sb look like

9.Some young people always need help from their parents.

need 用法总结:

need sb/ sth 需要某人或某物例:I need a pen to write with.

② sb need to do sth 某人需要去做某事例:He needs to have a good rest.

③ sth need doing 某物需要被... 例:My bike needs repairing.

④ needn’t 用来回来Must 提出的问句例:--Must I bring my homework now?

--No, you needn’t.

重点语法:

形容词的比较级和最高级分为规则变化和不规则变化

规则变化如下:

1) 单音节形容词的比较级和最高级形式是在词尾加-er 和-est 构成;

great long

2) 以-e 结尾的单音节形容词的比较级和最高级是在词尾加-r 和-st 构成;

wide nice

3)以辅音字母+y结尾的形容词,比较级和最高级是把y 去掉,加上-ier 和-est 构成;

happy empty

5) 辅元辅的形容词,比较级和最高级是双写该辅音字母,再加-er和-est;

big fat

6) 部分双音节和多音节形容词,比较级和最高级需用more 和most 来构成。

beautiful difficult

常用的不规则变化的形容词的比较级和最高级:

good/well------better------best

many------more------most

much------more------most

little-----less----least

bad/ill------worse------worst

far------farther/ further---farthest/furthest

old----older/elder------oldest/eldest

形容词前如加less 和least 则表示"较不"和"最不"

important 重要less important 较不重要least important 最不重要

1. 两者比较时用形容词比较级,其结构为“... 比较级+ than ...”

如:Actions speak louder than words.

2. 在两者之间选择“哪一个更……”时,用句型“Which / Who is +比较级, ... or ...?”

如:Which sweater is cheaper, the red one or the yellow one?

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