Nobody knows what he can do till he has tried.

9) Nothing is ~~ er than to

Nothing is more important than to receive education.

10) There is no doubt that ~

There is no doubt that our educational system leaves something to be desired.

11) So …is…that … （如此...以致于...）

So precious is time that we can't afford to waste it.

12) Adj as…is

Rich as our country is, the qualities of our living are by no means satisfactory.

13) the more…the more…

The harder you work,the more progress you will make.

14) By doing, we can…

By taking exercise,we can always stay healthy.

15）It is time+过去式（该是...的时候了）

It is time the authorities took proper steps to solve the traffic problems.

16) Those who…

Those who violate traffic regulations should be punished.

17) It pays to do…（...是值得的。）

It pays to help others.

18)不定式、动名词作主语

To know something about English is one thing; to know English is quite another.

19）It is no use doing sth.

It is no use crying over the spoiled milk.

20) “too…to”句型

She is too angry to speak.

21) “so…that…” “…so that…”句型

He ran so fast that nobody could catch him up.

The teacher explains the sentence slowly and clearly so that everyone can understand.