1、be的用法
（1）构成进行时态（be+v.-ing形式）
He is waiting for the bus.
他在等公共汽车.
The sun is shining.
太阳在照耀着.
（2）构成被动语态（be+v.-ed形式）
We were deeply moved by his speech.
我们深深为他的讲话所打动.
The work was done very well.
这个工作做得很好.
（3）表示事先计划、安排好的动作（be+to do）
We are to meet at the station at seven tomorrow moring.
我们明天早上七点在火车站集合.
We are to put up a new school by the river.
我们将在河边建一所新学校.
（4）即将发生的动作（be+about+to do）
We were about to leave when it started to rain.
我们刚要走,这是下起雨来.
The mass meeting is about to begin.
群众大会即将开始.
2、have的用法
（1）构成完成时态（have+v.-ed形式）
They have cleaned the classroom.
他们已经打扫了教室.
I had my lunch before I came.
我来之前已经吃过午饭.
（2）构成完成进行时态（have been+v.-ing形式）
He has been working in this factory for twenty years.
二十年来他一直在这家工厂工作.
Before I went to college,I had been learning English for nine years.
我上大学之前,已经学了九年英语.
3.do的用法
（1）构成否定和疑问句
I don't like this mobile phone,so I want to return it.
我不喜欢这个手机,我想把它推掉.
Do you like this design?
你喜欢这种图案吗?
（2）加强语气
Do come tomorrow.明天一定会来.
（3）代替前面刚出现的动词以避免重复
He speaks English fluently,and so do you.
他的英语讲的很流利,你也讲得很流利.
You speak French as fluently as she does.
你的法语讲的像他一样流利.
4.shall(should)和will(would)的用法
助动词shall(should)和will（would）构成一般将来（过去将来）时态,后面加动词原形.
Will they have anything to do tonight?
今晚他们有事吗?
Tomorrow we shall finish the work.
我们明天将完成这项工作.
The CCTV weather report this morning said that we should have rain.
中央电视台今晨的天气预报说,我们这儿将有雨.
希望对你有帮助!
