广州新版八年级上册Unit3Computers

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 ho mework .

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

“某人如何”

What does sb like“某人喜欢什么”用于询问某人的爱好

What does sb look like“某人长什么样”用于询问某人的外貌

·

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

3. 表示“两者之间最……的一个”时，用“the + 比较级”

如：Lucy is the taller of the twins.

4. 表示“越……，越……”时，用“the + 比较级，the + 比较级”