本文目录
英语所有助动词
助动词 最常用的有:be,have,do,shall,will,should,would
a.表示时态,例如:
He is singing.他在唱歌.
He has got married.他已结婚.
b.表示语态,例如:
He was sent to England.他被派往英国.
c.构成疑问句,例如:
Do you like college life?你喜欢大学生活吗?
Did you study English before you came here?你来这儿之前学过英语吗?
d.与否定副词not合用,构成否定句,例如:
I don't like him.我不喜欢他.
e.加强语气,例如:
Do come to the party tomorrow evening.明天晚上一定来参加晚会.
He did know that.他的确知道那件事.
英语中的助动词有哪些?
do did done, have had ,所有情态动词
所有的情态动词都是助动词吗
情态动词常见的有:1.can,2.could,3.be able to,4.may,5.might,6.must,8.need,9.dare,10.shall,11.will,12.should,13.ought to,14.would
最常用的助动词有:be, have, do, shall, will, should, would
动词介词短语和动词副词短语怎么区别?
所谓的助动词就是帮助构成构成各种时态、语态、否定、疑问等的词.助动词一般没有词意,不能单独作谓语动词.如:
(1) be后跟现在分词构成进行时态.
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.
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表示计划、安排将要发生的事.
I'm to have supper with John this afternoon.今天下午我要与约翰一起吃晚饭.
②表示指示、命令,否定式表禁止.
You are to see the headmaster today.今天你必须去见校长.
③表示义务、责任等,同should.
You are to be back before 5.你得在5点钟以前回来.
④表示可能性,与情态动词may,can同义.
Not a sound was to be heard.一点声响也没有.
⑤表示后来发生的事,可以用来表示命运或注定
He was to regret the decision.他有一天会后悔做出这一决定的.
2、助动词have(has,had,having)的用法
(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.
(2)和不定式构成谓语,表示客观上不得不做的事情.
-Do we have to start work?我们得立刻工作吗?
-No.We don't have to.不,不必了.
3、do(does,did) 的用法
(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.
(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.
(5)构成否定的祈使句.
Don't be so careless.不要那么粗心.
4、shall(should)和will(would) 的用法
(1)shall(should)用于第一人称的将来时中,单纯表示来
I shall think it over.我要好好考虑一下.
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.
用Be动词的另一种用法,它与其后的形容词、数词、名词、介词短语或副词等构成系表结构,一起当谓语:
He is old.他年纪大了.
We are in the room. 我们现在在房间里.
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