2. 并列连词的使用：

but, or, for, and, so

　　（1）and 表并列

　　She got up and fell down again.

　　（2）but 表转折

　　He is rich but unhappy.

　　（3）or 表选择

　　Which do you prefer, tea or coffee?

　　（4）for, so表因果

　　He is absent, for he is ill.

　　It's too dark, so I couldn't see anything.

（二）情态动词表达建议

　　You can listen to a recording of the lesson.

You shouldn't study everything in one night.

In this country, you have to drive on the left.

I think it might rain later this afternoon.

You mustn't eat or drink in class.

建议：

You should know more about yourself.

　　You can read and listen to English a lot to improve your English.

　　You should listen to the teacher carefully in class.

　　其他方法：

　　Why not...

　　Why don't you...

　　How about ...

　　What about ...

　　Let's...

（三）词汇和词组：

1. take charge

I take charge and lead the group.

　2. think about

　　Before you talk, you need to think it about.

3. read through

Let's read through the text.

4. look up

I have to look up the new words in the dictionaries.

5. be clear about

　　I'm not clear about the material.

　6. find out

Can you find out why he hurt his leg.

7. at the end of