1. It's (is/has been) two years since he left China.

2. It's (is) the first time that I have visited Shanghai.

3. have/has been to … 曾經到過某地 

    have/has gone to … 去了某地

4. Where there is a will, there's a way.

5. It was not long before I forgot it all.

6. need/want/require + to be done/doing 

7. do nothing but do ; have no choice but to do

8. The boy has his own idea of how to finish it.

9. He is easy to deal with. / You are lucky to get there on time.

10.In order to/ to so as to find a good job, we should study well.

11. too… to / enough to do

12.He is too young to go to school. / He is old enough to go to school.

13. 獨立成分: 

To tell you the truth, … (句子)

To be fair, … (句子) / To be frank, … (句子)

To be sure, … (句子) / To make matters worse, … (句子)

be to do / be about to do / be going to do

had better / best (not) do 

14. 不得不:

cannot but do / cannot choose but do / cannot help but do

do nothing (= not do anything) but / except do 

go / come + do 

eg: Please come sit here. / Go ask you mum.

Why not do? (Why don't you do?)

There's no time to do 

It must be pointed out that … 必須指出

It is reported that … 據報道

It is believed that … 大家相信

It has been decided that … 經決定

It is thought that … 大家認為

It is taken for granted that … 被視為當然的

It's said that … 據說

It is known that … 眾所周知

倍數 + as… as

倍數 + -er + than

倍數 + the size (length; depth…) of the + n. 

One who has nothing to fear for oneself dares to tell the truth. 

Anyone who fails to finish the task given should be criticized. 

Those who want to go to the Great Wall sign up here. 

As everybody knows, Taiwan belongs to China. / Taiwan belongs to China, as everybody knows.

one of + 復數名詞 + 關系代詞 + 動詞復數; the (only) one of + 復數名詞 + 關系代詞 + 動詞單數。

例如：

Titanic is one of the most wonderful movies that have been produced in Hollywood. 

Titanic is the (only) one of the most wonderful movies that has been produced in Hollywood.

It's true that the earth is round. / That the earth is round is true. 

Whether he will come (or not) hasn't been decided. 

Whoever leaves the office should tell me. / Anyone who leaves the office should tell me.

China is no longer what she used to be. 

What I wonder is who will be our team leader soon.

We think it (is) quite right that all the people ought to obey the laws.

that 引導的從句: 

I could say nothing but I was sorry. 

He differed from other people in that he always looked father ahead in his work.

Your composition is quite good except that there are some spelling mistakes.

某些形容詞后跟賓語從句:

I'm sure that he will win. / I'm not sure whether/if the news is true (or not).

I'm afraid that I'll be late.

He is glad that you passed the exam.

對……表示懷疑

I don't think you are right, are you?

I think he is right, isn't he?

I doubt whether / if …我懷疑……是否……

I don't doubt that… 我毫不懷疑……

There's no doubt that…

Without doubt, …

Undoubtedly, …

比較級+ than any other + 單數名詞

例如：

He is better than any other student in the class.

比較級+ and + 比較級

例如：

The earth is getting warmer and warmer.

越……就越……: the + 比較級……, the + 比較級……

例如： 

The more a man knows, the more he discovers.

The more works of his he read, the more freely he will understand his works.

The busier he is, the happier he feels. 

例如：

Use your head, and you'll find a way. 

Hurry up, or you'll miss the bus.

It is easy (difficult hard important right wrong possible) to do…

It is a pleasure (pity, pleasant thing, crime, an hour…) to do sth.

It takes (sb.) some time to do sth.

To be fair, it is not all his fault. 

Generally speaking, Super girls are popular with the middle school students. 

Judging from his wearing, he must be an artist. 

According to his report, the situation is getting serious. 

There is/are (I/we) + (some) trouble, problem, fun, pleasure, a good time, a hard time (in) + doing sth.

There's no harm, hurry, need, use (in) + doing sth.

I suggested my staying here. / I suggested (that) he (should) start as soon as possible. / His expression suggested he got angry.

make oneself done ; 

have / get sth. do / done ; 

leave / keep / have sb. do / doing ; 

find sth doing / done ; find sb. doing

It's easy… for sb. to do…

It's clever… of sb. to do …

It's a pity… to do…

It takes sb. some time to do…

 V. + doing & V. + (sb./sth.) to do

consider doing 考慮做 consider sth./sb. to do 認為

remember doing 記得做過 remember to do 記得去做

forget doing 忘記做過 forget to do 忘記去做

regret doing 后悔做了 regret to do 遺憾地去做

mean doing 意味著做 mean to do 計劃, 打算做

stop doing 停止做 stop to do 停止去做

try doing 試著做 try to do 盡最大努力做

go on doing 繼續(xù)做 go on to do 繼續(xù)做另一件事

used to do sth. / would do sth. 過去曾經做 get/be used doing 習慣于做

can't help doing 忍不住做 can't help to do 不能幫忙做

advise, allow, permit, forbid sb. to do / sb. be ~ed to do…

advise, allow, permit, forbid doing 

promise to do sth. / promise sb. to do sth.

hope to do / expect sb. to do

I want something to read. / I want read something.

寧愿…而不愿…

prefer + n. + to + n.

prefer doing + to(介) + doing 

prefer to do sth. rather than (to) do sth.

would /had rather (sooner) + do sth. + than + do sth. 

would rather (not) do sth. 寧愿做

would rather sb. did 要做(虛)

seem, appear, prove to do / to be doing / to have done

happen to do， happen to sb.

consider, believe, feel, make, find, know, regard it … to do

We want to watch TV instead of (而不是) do our homework. instead of doing

最好做…… had better/had best + (not) do sth.

Although there are many difficulties, we are still determined to carry out the task. Despite many difficulties, we are still determined to carry out the task.

例如：

He is looking for a room to live in.

Please pass me some paper to write on.

He has no money and no place to live. / I think the best way to travel is on foot.

There is no time to think. / You are the first (person) to come.

I want something to read.

感官性動詞不定式省略to,但在被動語態(tài)中要加to

feel, hear, listen to, watch, look at, make, sb. do…

sb. be ~ed to do

I have / There is / are (some) trouble, difficulty, problem, fun, pleasure, a good time, a hard time (in) doing / with sth.

There is no harm, hurry, need, use, good (in) doing sth.

sb. spend some time (in) doing / on sth.

It is (of) no use, good, useless doing …

sth. want / need / require doing / to be done …

be busy (in) doing sth. / be worth (in) doing sth. 

be worthy of being done / be worthy to be done 

例如：

Thank you for having helped me so much.

I don't remember having received his letter. 

= I don't remember receiving his letter.

He went out without being noticed. / He insisted on not being sent to the hospital.

I wish I did / had done / would (could) do…

Lest + 主語 +should + V. (原形) they got up early lest they should miss the rain.

It's …(被強調內容) that… ; (陳述句，強調物) 

It's …(被強調內容) that／who …(強調人)

Is / Was it … that…? (一般疑問句); 

Wh- is /was that…？(特殊疑問句) 

It's not until + 被強調內容 + that… 

It is the place where-cl(強調定語從句)

It's because-cl(強調狀語從句) that…

Only + 狀語(詞/短語/從句) + 助動詞/be + 主語

例如：

Only in this way can we work out the problem. 

Only here can we step in. 

Only when he comes back , could we start eating. 

Only + 主語(不倒裝)

例如：

Only you can go with me.

Were / Should / Had + 主語 + … + " , " + 主句 

= If + 主語 + were / should / had…; 

Not until all the people get on it will the bus go. 

as 句型

例如：

Young as he is, he knows a lot of things.

King as he is, but he is unhappy.

一……就……

hardly… when…; scarcely… when…; no sooner… than…

例如：

Hardly did he see me when he ran away.

If necessary / possible…, the boss will go by himself. 

When in trouble, he always asked me for help.

Though surrounded, the solders didn't give up.