◆1)It is 形容词 that

It is conceivable that knowledge plays an important role in our life.

可想而知，知识在我们的一生中扮演着一个重要的角色。

◆2)It is 形容词 to do/ doing

She had said what it was necessary to say.

她已经说了一切有必要说的话。

◆3)祈使句/名词 and/ or

Work hard, and you will finally be able to reach your destination.

努力工作，你就能实现自己的目标。

◆4)as many/ much 名词 as

It is said that visitors spend only half as much money in a day in Leeds as in Lon-don.

据说，游客每天在利兹的花销仅为在伦敦的一半。

◆5)倍数词 as 形容词 as

The reservoir is three times as big as it was ten years ago.

这个水库的面积是十年前三倍。

◆6) 倍数词 more 名词/形容词十than

Smoking is so harmful to personal health that it kills seven times more people each year than automobile accidents.

吸烟对人体健康的危害极大，每年死于吸烟的人比死于车祸的人多七倍。

◆7)(not)as/ so...as(和……(不)一样)

The environmental problems are not as serious as they suggested in their report.

环境问题没有他们在报告中说得那么严重。

◆8)no more...than(与……一样不)

She is no more fit to be a manager than a schoolgirl would be

一个女学生固然不宜当经理，她也同样不宜。

◆9)Nothing is more...than(没有比……更……的;……是最……的)

Nothing is more important thanto receive education.

没有比接受教育更重要的事。

◆10)感官动词 of 名词

They hurriedly escaped into a cave that smelt of terror.

他们仓皇地逃人一个充满恐怖气氛的山洞。

◆11)without/ not so much as(甚至没有)

Disappointed with her husband，Mary left home without so much as looking back at him.

出于对丈夫的失望，玛丽离开了家，甚至都没有回头看他一眼。

◆12)may/ might as well(…as)(与其……还不如……)

One may as well not know a thing at all as know but imperfectly.

与其一知半解还不如彻底蒙在鼓里。

◆13)too...to(太……而不能……;极其地)

It was not too bright of them to settle in an area where earthquakes frequently occur

他们选择在地震多发的地区定居，这可不是个明智的决定。

◆14)only to find/ see(结果却;没想到会)

He spent almost all his money to buy the hen which was said to be able to lay gold eggs, only to find it could not lay eggs at all.

为了买那只据说能下金蛋的母鸡，他几乎倾家荡产，没想到这只鸡根本不会下蛋。

◆15)It is undoubted that/ There is no doubt that(毫无疑问，……)

There is no doubt that war can be avoided if we get down to peace talk.

毫无疑问，如果我们肯认真和谈就能避免战争