一、 That可以做副词，代词，形容词和连词，但是做连词时是最常见的，也是最难鉴别的， that 用作连词，引导名词性从句,状语从句和强调句。
I didn't expect (that) he could win the championship.
The teacher pointed out that Tom was not working hard enough.
That the earth goes around the sun is known to everyone.
(It is known to everyone that the earth goes around the sun.)
The trouble is that we are short of money.
The news that he resigned from office surprised us.
The idea that he holds is very common nowadays on campus.
Bring it nearer that I may see it better.
What have I done that he should be so angry with me?
I am afraid that I will fail in the driving test.
Difficult that/as the task was, they managed to accomplish it on time.
Supposing that you were in my position, what would you do?
On condition that you were lost in the desert, you should ask for help as soon as possible.
It is Mrs. White that makes the decision in her family, not her meek little husband.
It is an ill wind that blows nobody good.
Is he the man that wants to see you?
The package that you are carrying is about to come unwrapped.
We must strike while the iron is hot.趁热打铁。
While he loves his students，he is very strict with them..
While there is life there is hope.
Honey is sweet，but the bee stings.
Which is my seat? 哪个座位是我的?
He also had a gun with which to defend himself. 他还有一把自卫用的枪。
The driver asked me where I wanted to go.
Where shall we go?
That's where we differ.
This is the city where I was born.
I'll meet him where I first met you.
Where does he come from?