初中英语语法助动词的用法思维导图

(1) be后跟现在分词构成进行时态。

Who is playing the violin?谁在拉小提琴?

She was reading a book then.那时她正在读书。

(2)be后跟过去分词构成被动语态。

He was asked to do the work.有人要他干这件工作。

You are invited to attend the meetintg.有人邀请你参加会议。

(3)be 后跟不定式作谓语，有如下几种情况：

(1)助动词have可以构成完成时或完成进行时

He has been a doctor for 10 years.他当医生十年了。This is the place I have been longing to visit.这就是我一直渴望参观的地方。

(2)和不定式构成谓语，表示客观上不得不做的事情。We've missed the train. We'll have to wait for another one.我们己经误了火车，我们只能等下一列。

-Do we have to start work?我们得立刻工作吗?

-No. We don't have to.不，不必了。

(1)构成疑问句或否定句

How did you know about it?你是怎样知道这件事的。

He does not smoke. 他不抽烟。

(2)加强语气。

He did tell that.他的确告诉了此事。

Do come and see us.一定来看我们。

(3)代替前面刚出现的动词，避免重复。

-You like popular music, don't you?你喜欢流行音乐，是吧?

-Yes , I do.是的，我喜欢。

He speaks French as fluently as she does.他讲法语和她讲的一样流利。

(4)用于倒装句中。

Never did he pay attention to my words.他从不注意我的话。

Only then did I understand the importance of English.只是那时，我才了解到英语的重要性。

(5)构成否定的祈使句。

Don't be so careless.不要那么粗心。

Do not hesitate to come for help.只管来求助。

(1)shall(should)用于第一人称的将来时中

I shall think it over.我要好好考虑一下。

When shall I see you again?我何时再见到你?

I rang up to tell her that I should leave for London. 我打电话告诉她我要去伦敦。

(2)will用于第二、第三人称的将来时态中，在现代英语中可以用于所有人称

He will be 30 next month. 他下月将是30岁。

You will have an English test tomorrow.明天你有英语小测验。

He wanted to know when you would finish the writing.他想知道你何时完成写作。