1）主语从句

It is common knowledge that honesty is the best policy.

It is well-known that…

It is self-evident that…

It goes without saying that…

It is universally acknowledged that…

（It is a truth universally acknowledged, that a single man in possession of a good fortune must be in want of a wife.—Pride and Prejudice）

2）宾语从句

They believe that the central government’s decision to develop the western part of the country and the success of Beijing’s bid to host the 2008 Olympics will open up further opportunities for the country’s development.

We cannot understand why he was so cruel to his roommates.

Experience from foreign countries suggests that no aircraft manufacturers can survive depending only on their domestic market.

3）表语从句

This is where she lived when she was young.

Quality is what counts most.

The problem is not who will go, but who will stay.

What we want to know is whether the government may take measures to tackle this problem.

The question is which one you may choose.

4）定语从句（限定性和非限定性）

As is known to everyone, …

There are many reasons why I want to study in your university.

It is estimated that tens of billions of yuan is spent on cigarettes every year in our country, which is a huge waste.

We sent Xiao Wang a lot of flowers, which expressed our love and care for him.

5）状语从句（时间，原因，地点，条件，让步，转折等）

When the man is enjoying the cigarette, the smoke becomes a monster （怪物） which will devour him.

Whatever the reason, there are still some problems with student use of computers.

6）分词短语做定语或状语

Prof. Smith came to our university, giving us a lecture on how to acquire English better.

7）强调句

It was him who gave us much hope for the future.

8）倒装句

Only through these measures can we hope to solve the problem.

Scattered around the globe are more than 100 small regions of isolated volcanic activity known to geologists as hot spots.

9）省略句

If so, we have to give it up.

If necessary…

Whatever the reason…

10）What句型

We totally agree with what you have just said.

11）设问句

Do you still remember the boy who cried wolf for several times so no one would trust him?

12） 被动句

Some measures should be taken to deal with the problem.

He is said to have accomplished a lot of great deeds.

Many people believe that…（It is believed that…）

The government and the public should pay enough attention to…（Enough attention should be paid to…from both the government and the public.）