3)先行词为any，no，only，every等修饰时用that。

That is the only way that we can find at present.

This is the very museum that we visited for the first time.

4) that可以用来引导限制性定语从句，当它在从句中作介宾时，介词应后移。

This is the good student that the teachers talked about just now.

5)先行词为既指人又指物的并列名词时，用that.

My mother and her old friends talked of the things and persons that they remembered in the school.

定语从句练习

I.用适当的关系代词或关系副词填空

1. Yesterday I met Doctor Wang, ____ told me the good news of his son's passing the examination.

2. The two pupils ____ you taught three yeas ago have become teachers.

3. He began to work in Beijing in the year ____ New China was founded.

4. I don’t know the reason ____ she didn't agree to our plan.

5. This is Carry ____ son died in the War of Resistance Against Japan.

6. He told us everything ____ he had seen in the traffic accident.

7. This was the best model of the TV set ____ the factory produced last year..

8. They have visited the Museum of Chinese History ____ Premier Zhou’s life and deeds are being shown.

9. Alice, ____ dress is all red, looks very pretty.

10. The first thing ____ I am going to do this evening is to write a report about the experiment.

II.用关系代词which或as填空

1. He is an American, ____ I know from his accent.

2. She was not discouraged, ____ can be seen from her eyes.

3. The sun heats the earth, ____ makes it possible for plants to grow.

4. ____ was usual with him, the old man went out for a walk after supper.

5. It was raining, ____ was a pity.

6. He said he had been to America, ____ is untrue.

7. ____ is well known, China is in Asia.

8. Edison was one of the greatest scientist, ____ is well-known.

9. He must be from Africa, ____ can be seen from his skin.

10. Air, ____ we breathe every day, is a mixture of gases.