内容正文:
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9B
U1基础强化
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9B Unit 1 Saving the Earth
语法补充及强化
as…as…
1. 同级比较有两种情况:
(1)as+形容词/副词的原级+as… 和……一样……
(2)not as+形容词/副词的原级+as… 和……不一样……;不如……
My parcel is _____________________________. 我的包裹与你的一样重。
It is not ____________________________________. 今天不像昨天那么热。
【答案】as heavy as yours as hot as yesterday
注意:同级比较与比较级的转换
(1)Tom is not as tall as John. 汤姆不如约翰高。
= Tom is __________ __________ John. 汤姆比约翰高
【答案】shorter than
(2)Tom is not as careful as Mary. 汤姆不如玛丽认真。
= Tom is than Mary. 汤姆没有玛丽认真。
【答案】less careful
2. 表示倍数。
Asia is four times as large as Europe. 亚洲有欧洲的四倍大。
3. as…as的结构有这样两种常见句型:
as much+不可数名词+as
as many+复数可数名词+as
She spread ________________________ Jane usually does. 她在面包上涂得黄油与简通常涂的一样多。
He has learnt ___________________________ his brother (has). 他已学了和他哥哥一样多的英文单词。
【答案】as much butter on her bread as as many English words as
4.在as…as结构中,若形容词作定语修饰单数可数名词,不定冠词a/an应置于形容词和名词之间,不可放在形容词之前。如:
她和你的父亲一样是个好老师。
She is as good as a teacher as your father. (T)
She is as a good teacher as your father. (F)
动名词v-ing
动名词v-ing在句中起名词作用,可作主语、表语和宾语等,其否定形式为not doing。
Playing with fire is dangerous. 玩火是危险的。(作主语)
Her job is teaching. 她的工作是教书。(作表语)
He admitted breaking the window yesterday. 昨天他承认打破窗户了。(作宾语)
其中,作宾语时需要注意以下几点:
(1)admit, dislike, enjoy, feel, finish, give up, imagine, include, keep, mind, miss, practice, put off, can’t help(情不自禁),can’t stand(无法忍受),suggest等动词或词组后只能用动词v-ing形式作宾语,不用能不定式。如:
He admitted breaking the window yesterday. 昨天他承认打破窗户了。
(2)forget, go on/continue, remember, stop, try等动词或词组后则可用动词-ing形式或不定式作宾语,但意义上有区别。如:
Let’s go on studying Lesson 6. 让我们继续学第六课。(指前面已学了第六课的一部分内容)
Let’s go on to learn Lesson 6. 让我们接着学第六课。 (指前面只学了前五课)
I remember doing the exercise. 我记得做过练习。
I remember to do the exercise. 我记着要做练习。
I tried not to to go there. 我尽量不去那里。
I tried doing it again. 我试着又干了一次。
He stopped speaking. 他停止了讲话。
He stopped to talk. 他停下里开始讲话。
(3)在love, hate, prefer, like等动词后接动词-ing形式或不定式的意义无多大区别。用动词-ing形式作宾语时常指一般情况,而用不定式作宾语时常指某一具体行为。如:
I like swimming. 我喜欢游泳。 (泛指一般的爱好)
I do