常见比较结构的区别
1. more and more与 the more…, the more…:前者表示“越来越……”,后者表示“越……,越……”。如:
Our country is getting more and more powerful. 我们国家越来越强大。
The more we get together, the happier we will be. 人聚得越多,我们越快活。
2. more than 与less than:前者“(指数量)多于”、“不只是”、“非常”等,后者表示“少于”、“比……少”。如:
I’ve known him for more than 10 years. 我已认识他10多年了。
He is more than a father to her. 他待她胜过父亲。
She was more than kind to us. 她对我们很友好。
It cost me less than 10 pounds. 我买它没要上10英镑。
She eats less than she should. 她吃得比她应该吃的少。
3. more …than 与 less…than:前者表示“比……多,比……更”,后者表示“比……少,不如……”。如:
He has more books than me. 他的书比我多。
He is more careful than the others. 他比其他人更仔细。
I got less money than the others did. 我比别人得到的钱少。
注:两者均可表示“与其……不如”,但词序不同。如:(from www.hxen)
He is less a teacher than an expert. / He is more an expert than a teacher. / He is not so much a teacher as an expert. 与其说他是老师,不如说他是专家。
4. “no+比较级+than”结构:这类结构的实际意思是对待比较的两个对象进行否定,相当于该原级形容词或副词使用as…as结构的意思。如no better than = as bad as,意为“与……一样不好”,no faster than = as slow as,意为“与……一样不快”,no taller than = as short as,
意为“与……一样不高”等。
5. no more than与not more than:两者均可表示数量,前者表示“仅仅”、“只有”(= only),强调少;而后者表示“不多于”、“至多”(= at most)。如:
It is no more than five miles to the station. 去车站只有5英里。
truncate的区别
It is not more than five miles to the station. 去车站最多5英里。(from www.hxen)
6. no more…than与not more…than:前者用于否定两者,意为“同……一样不”(=neither ... nor);而后者只强调两者的程度不同,意为“不如”、“不及”(= not so ... as)。如:
He’s no more able to read Spanish than I am. 他和我都读不懂西班牙语。(=Neither he nor I am not read Spanish.)
She is not more clever than he is.  她不如他聪明。(= She is not so clever as he is.)
This film is not more interesting than that one. 这部电影不比那部电影更有趣。(This film is not so interesting as that one.)
比较等级的特殊句型归纳
(1) less/least +原级:表示降级的比较级或最高级。如:
I am even less lucky. 我甚至更不走运。
This is the least useful of the four books.四本书中这一本最无用处。
(2) the+比较级, the+比较级:表示后者随着前者的变化而变化,意为“越……就越……”,前者相当于一个条件句,因此,要用一般现在时代替一般将来时。如(from www.hxen):
The harder you work, the better result you’ll get.你学习越努力,成绩就越好。
(3) the+比较级(+of the two):表示“两者中较……的那个人或物”。如:
Tom is the taller of the two brothers.汤姆是两兄弟中个子较高的那个。
(4) 比较级+and+比较级:表示“越来越……”,单音节形容词或副词用“-er+and +-er”,如warmer and warmer越来越暧和;多音节形容词或副词用“more and more…”如more and mo
re beautiful越来越美。
(5) 比较级+than any other+单数名词:表示最高级意义。如:
Mike is more intelligent than any other student in his class.(=Mike is the most intelligent in his class.)马克比他班上任何一个人都聪明。
(6) 否定词语+比较级:表示最高级含义。如:
Nothing is easier than this.(=This is the easiest thing.)没有比这更简单的了。
(7) 否定词语+ so…as:表示最高级含义。如(from www.hxen):
Nothing is so easy as this.没有比这更简单的了。
(8) more+形容词或副词+than…:表示对同一人或物在不同方面进行取舍,意为“与其说……倒不如……”,不论形容词或副词的长短,一律用more…than…。如:
He is more hungry than tired.与其说他累了,倒不如说他饿了。
(9) no +比较级+ than:表示对两者的否定,意为“和……一样不……”,与neither…nor…或“as+相反意义的形容词或副词+as”相当。如
Tom is no taller than Mike. =Neither Tom nor Mike is tall. =Tom is as short as Mike.汤姆和迈克都不高(或一样矮)。
比较:“not+比较级前+than”表示前者不如后者。
Tom is not taller than Mike.汤姆不比迈克高。

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