很多同学想知道英语情态动词有哪些，有什么用法呢?下面小编为大家介绍一下!
英语中有哪些情态动词
情态动词,在英文中主要用来表示说话人的看法、态度等.它很接近中文里的能愿动词.从用法上来说,它有这样几个特点：
1)各个情态动词自身都有一定的词义。
2)情态动词不能在句中独立担当谓语。
3)情态动词在句中不受任何人称,性,数变化的影响。
4) 情态动词后接的不定式(除ought外)都不带to ,即接动词原形.英文中的情态动词主要有：can ,could ; may ,might ; must ; ought ; need ; dare ,dared ,另外,shall ,will ,should ,would在一定的场合也可用作情态动词.动词不定式的基本形式是“to+动词原形”,有时可以不带to.动词不定式(或不定式短语)没有人称和数的变化,在句子中不能作谓语.动词不定式仍保留动词的特点。
英语情态动词用法顺口溜
情态动词要记牢;动词原形来跟梢。
不管人称单复数;现在过去乐逍遥。
can表能力和许可;也许可能may来表;
必须一定must;should应该来报到。
回答不须needn’t;mustn’t为不必要。
否定只要接not;疑问赶紧往前跑。
情态动词的用法归纳
Will 和 would的用法
1.will和would表示意愿、意志，可用于各种人称
If you will help me with my English, I will be very happy.
I promised that I would do my best.
2.在疑问句中,will用于第二人称,表示请求或征求意见,would则语气更委婉
Will you tell him the news as soon as he comes back?
Would you please speak again more slowly?
shall ,should 和ought to
1.shall用于第二、三人称表示允诺、警告、命令、决心等。
You shall do as I say. (命令)
Tell him that he shall have the book tomorrow. (允诺)
Nothing shall stop me doing it. (决心)
2.在疑问句中,用于第一、三人称，用来表示请求或征求意见。
Shall I open the window for you?(征求意见)
Shall he fetch some water for you?(请求)
3. should常表示劝告、建议、命令，与ought to意义相近，但ought to多表示责任、义务，语气强烈。在疑问句中通常用should代替ought to。
Young people should learn how to use computers. Every citizen ought to obey law. You ought not to go.
4.should/ought to have done表示责备或批评,意为“本应该做到…但没有做到…”,用于否定则表示“本不该…但”ought to的语气更强烈.
You should/ought to have told her the truth earlier.
She shouldn’t have left without saying a word.
must 和have to用法
1.Must用于一般问句中,肯定回答用must否定式用 needn’t或don’t have to，做 “不必”,mustn’t表示“禁止，不允许”
— Must I finish all assignments at a time?
—Yes, you must.
No, you needn't.
You mustn’t get down while the car is still moving.
2.表示“必须”这个意思时，must 和have to 稍有区别。must着重说明主观看法，have to 强调客观需要。另外，have to 能用于更多时态。
I don’t like this TV set. We must buy a new one. There was no more bus. They had to walk home.
3.must表示对某人某事的猜测， 作“准是”，“一定” ，一般用于肯定句中。对过去发生的事情作肯定判断用must have done
You must be the new teacher.
He must be joking. There is nobody here. They must have all gone home.
