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等比句 　　句型［主语（主体）+谓语+as+形容词/副词+as+被比对象］

1.    He is as tall as I (am).  2. This window is just as wide as that one.

3.  This is just as good an example as the other.  4. Does John work as hard as Henry?

5.  We have accomplished as much in the past three years as would have taken ten years in the past.

[注] 如果形容词后有一个单数可数名词, 不定冠词应置于名词之前形容词后, 如：He is as poor a speaker as I.

句型［主语+谓语+no more形容词//副词（或no +形容词/副词比较级）+than+被比对象］

1.    She is no less diligent than her elder sister. 2. One minute too late is no more in time than half an hour.

3.  The food on the ship was no better than on any other ship on which Billy had sailed.

4.  We too have a head and two hands and are no stupider than others.

5.  China's women, no less than men, are participating in all kinds of work in the socialist construction of their country.

[注] 如果两个主语相比，谓语动词应与前一个保持一致关系。如： He no less than you is (不是are) diligent.

[附注] 表示等比的还有以下一些方式：

1) "…be equal to+被比对象"如：A dingle day is equal to twenty years.   In strength, he is equal to me.

2) "…be worth+被比对象" 如：An inch of time is worth an inch of gold.  A bird in the hand is worth two in the bush

3) 用其他词语表达：Three early mornings will make a day. Only he in our class can cope with you in knowledge of English.

差比句 　　句型［主语+谓语+形容词比较级/ 副词比较级+(名词)+than+被比对象］

1.    Too much help is sometimes worse than no help.

2.    Facts speak louder than eloquence. (Actions speak louder than words.)

3.    Our room is a little larger than theirs and it has more furniture in it.

4.    Light does not travel at the same speed through all materials; it goes slower through some than through others.

[注] 这种形容词组合还可以作定语，置于名词之后。如：It feeds on worms and other fish smaller than itself.

句型［主语+谓语+more/less+形容词原级/副词+than+被比对象］

1.    This book is more interesting than that one.

2.    He is more attentive in class now than he was last term.

3.    It's less cold than it was yesterday.

4.    He works more regularly than you do.

5.    The new edition is less expensive than the old one.

[注1] 使用比较级要注意两点：

1) 不要使用双重比较级， 如：(误) His younger brother was more stronger than he.

(正) His younger brother was much stronger than he.  His younger brother was stronger than he.

2) 不要使用无比较对象的孤立的比较级。如：(误) We saw many smaller houses on both sides of the river.

(正) We saw many small houses on both sides of the river.

(正) We saw many houses smaller than usual on both sides of the river.

[注2] 比较级前可加一些增强语气的词，如：much, even, still, a little (bit), slightly, far , any, no, a lot 等。

My room is a little (bit) smaller than hers.  Eighteen is much less than eighty.

[注3] 如果表示"因…而更…" 可用句型 the+比较级+for (或because, as等词)，

如： I like him all the better for his faults.       I do not like him the less because he has faults.

He is none the happier for his wealth.   A good tale is none the worse for being twice told.