Unit4InventionsGrammar素材-牛津深圳版(广州沈阳通用)八年级英语上册备课资源(课文翻译+思维导图+课文解析+配套习题+单词短语)

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★思维导图
★语法:形容词(副词)比较级
1. 两者相比(甲=乙)用“as +形容词/副词原级+ as”表示。

如:
My English is as good as my brother’s.我的英语和我弟弟一样好。

Dick can type as fast as his uncle.迪克打字和他叔叔一样快。

2. 两者相比(甲≠乙)用“as / so +形容词/副词原级+ as”表示。

如:
Mary is not as / so tall as her sister.玛丽不比她姐姐高。

The girl in red didn’t make the model plane as / so well as you.
穿红衣服的那个女孩没有你做的模型飞机好。

3. 成倍优势的比较问题。

(1)“倍数+ as … as”。

如:
Our school is three times as large as theirs.我们学校是他们学校面积的3倍。

This lift runs twice as fast as that one.这个电梯是那个电梯速度的2倍。

(2)“倍数+ the size / length / width / height / depth … of”。

如:
Our school is three times the size of theirs.我们学校的面积是他们学校的3倍。

The new road is four times the width of the old one.
这条新路的宽度为那条老路的4倍。

以上结构可以转化为“净倍数+比较级+ than”,表达同样的意思。

试比较:
Our school is two times larger than theirs.我们学校比他们学校大2倍。

The new road is three times wider than the old one.这条新路比那条老路宽3倍。

因此,在这种情况下使用比较时,要特别注意倍数的数量问题,要特别注意倍数的数量问题,要剔除基准数。

换言之,在“倍数+ as … as”中的倍数为n,在“净倍数+比较级+ than”中,净倍数应为n-1。

4. 名词置于as … as之间的特点。

在该结构中,所用的名词一般是可数名词,且常需不定
冠词分隔形容词和名词。

如:
as good a teacher as my father 父亲般的好老师
as experienced an engineer as Dick’s brother 像迪克弟弟一样有经验的工程师
5. as … as结构引导从句,所接代词格的选择。

在口语中,一般常用宾语。

如:
You can’t expect to type as fast as me (= as I do).你不能指望和我打字一样快。

She is not as clever as Dick (= as he is).她不像迪克那样聪明。

在容易引起歧义的情况下,需合理选用所属格。

试比较:
You hate him a s much as me ( = you hate me).你讨厌他就像讨厌我一样。

You hate him as much as I (= I hate him).你像我一样讨厌他。

由此可见,不同属格,意义迥异。

注意:
1.在表示“和……一样……”时可用“as……as”结构(前面的as后要用原级):
He is as busy as ever.
他还是和以前一样忙。

We’11 give you as much help as we can.
我们将尽量帮助你。

His hands are as cold as ice.
他的手冰冷。

The airport was as crowded as ever.
机场还像平常那样拥挤。

2.在表示“不像……那样……”时可用“not as(so)……as”:
It is not as cold as in Geneva.
这里不像日内瓦那样冷。