高中英语情态动词讲解

一、情态动词用法1.情态动词的具体用法A.能干can/could do; (经过努力)能干be able to (have the ability to do, be capable of doing)B.必须干/不得不干must / have to do; 不许干：mustn’t doC.(经允许)可以干may/ might do; 不可以干：may not doD.应该干should /ought to/ be to/ be supposed to doE.将要干will/would/shall do; (按法律，许诺，命令，威胁，第二三人称中) 将干shall doF.(某段具体时间)常干would do; (现在不做，过去常做) used to doG.宁愿做would rather do; 最好做had better do; 不妨做might as well doH.需要做need do ; 敢做dare do2.情态动词表猜测A.一定是must be ;一定已经干了某事must have done sth.; 一定不是can’t/couldn’t be ; 一定没干过某事can’t/couldn’t have done sth.B.可能（不）是may/might (not ) be; 可能已经（没）干某事may/might (not) have done sth.3.情态动词与虚拟语气A.本应该干某事（带有批评责备之意）should/ ought to have done sth.；本不该做了某事而做了shouldn’t /oughtn’t to have done sthB.本不必干某事needn’t have done sth.C.本可以干某事can/could have done sth.D.本（不会）干某事would (not) have done sth.E.真希望做过某事would like to have done sth.F.Should 在表建议的从句中：(a)It’s high time that sb. should do/did sth(b)It’s important sb. (should) do sth.(c)I suggest sb. (should ) do sth.二、理解情态动词Lucy is an outgoing lady. She can play many kinds of musical instruments. Actually, she could play the piano when she was 8 years old. Lucy also keeps taking exercise every day. She says that she has to do some sports because she must keep slim. “You shall get fat soon if you don’t take exercise every day.” She usually says to her friends.As for her, an elegant lady should try to keep fit. However, last week, she found that she might put on weight and she worried and decided to lose her weight. And these days she is always thinking that she may succeed soon if she tries all her best. However, she is always lack of time because she ought to take care of her children.One night after supper, she walked quickly in order to go dancing at the Tomorrow Park and she was late. On her way, she thought that the dancing must havebegun, and the coach could have taught or shown many new moves. She was afraid that her friends might have left before she got there. She was regretful then. She should have had supper earlier, or she could have taken a taxi, and indeed she needn’t have taken a bath in advance. When she reached the park finally, she found nobody was there. She remembered suddenly that it had been reported on the radio that there would be a heavy rain that night.思考每个加黑的情态动词的含义；什么时候用情态动词的完成式，分别表达什么意思。

三、情态动词的运用单项选择1. You _____ come earlier. The bus left a moment ago.A. would B should have C. may D. have2. It is strange that the little boy _____ speak two foreign languages.A. could b. can C should D. would3. He _____ you more help, even though he was very busy.A, might have given B. might give C.may have given单句填空用must, can, may, might, shall, should, can’t, needn’t, mustn’t填空1.I worry about my weekend---I always have my plans ready before it comes.2.Just be patient. You expect the world to change so soon.3.---May I take this book out of the reading room?---No, you . You read it in here.4.You park here! It’s an emergency exit.5.I can’t leave. She told me that I stay here until she comes back.6.---I don’t really like James. Why did you invite him?---Don’t worry. He not come. He said he wasn’t certain what his plans were.7.It have been Tom that parked the car here, as he is the only one with a car.8.The traffic is heavy this day; I arrive a bit late, so could you save me a place?9.It’s usually warm in my homet own in March, but it be rather cold sometimes.10.She have left school, for her bike is still here.四、高考专项训练Wishing to encourage her young son’s progress on the piano, a mother took her boy to a Paderewski concert. After they were 1 , the mother spotted a friend in the audience and walked down the passage to greet her.Seizing the 2 to explore the wonders of the concert hall, the little boy rose and3 explored his way through a door marked “NO ADMITTANCE.” When thehouse lights dimmed and the concert was about to begin, the mother returned to her seat and 4 that the child was missing.Suddenly, the curtains parted and the spotlights focused on the impressive Steinway on stage. In 5 , the mother saw her little boy sitting at the key-board, 6 picking out Twinkle, Twinkle Little Star.At that moment, the great piano master made his 7 , quickly moved to the piano, and 8 in the boy’s ear, “Don’t quit. Keep playing.”Then 9 over, Paderewski reached down with his left hand and began filling in a bass part. Soon his right arm reached around to the other side of the child and he added a running obbligato (伴奏). Together, the old master and the young novice (beginner) transformed a frightening situation into a wonderfully10 experience. The audience was strongly 11 . .That’s the way it is in life. What we can accomplish on our own is hardly 12 . We try our best, but the 13 aren’t exactly graceful f lowing music. But when we trust in the hands of a Greater Power, our life’s work 14can be beautiful.Next time you set out to 15 great achievements, listen carefully. You can hear the voice of the Master, whispering in your ear, “Don’t quit. Keep playing.”1. A. seated B. sat C. dressed D. rested2. A. fact B. difficulty C. opportunity D. risk3. A. actually B. occasionally C. fortunately D. eventually4. A. discovered B. told C. accepted D. offered5. A. joy B. trust C. horror D. pleasure6. A. quickly B. personally C. generally D. innocently7. A. entrance B. disappearance. C. arrangement D. opening8. A. shouted B. repeated C. promised D. whispered9. A. turning B. bending C. rising D. handing10.A. creative B. effective C. annoying D. fearing11.A. addicted B. invited C. attacked D. attracted12.A. abnormal B. remarkable C. unimportant D. ordinary13.A. goals B. intentions C. results D. purposes14.A. luckily B. truly C. slightly D. fortunately15.A. overcome B. enjoy C. accomplish D. becomeWhen I was a ten-year-old girl, I was once asked to deliver a speech titled “A Real Test in My Life”. To talk before the whole class! Just imagine how 1 (terrible) shy I was the moment I thought of that with so many eyes fixed upon me. I had no other 2 (choose), though. First I was to draft the speech and that was just a piece of cake to me, because I was a good writer----something to pride myself in.But the hard part 3 (lie) in my oral presentation; to read from 4 paper was not allowed; I had to give the speech 5 my memory and in front of such a big audience! A real trial began when I stood on the platform with my legs 6 (tremble) and my mind blank. How much ti me had passed by, I didn’t know. My listeners were still waiting, patiently and without any signs of rushing me. Gradually found 7 back, giving out my speech with difficulty. Finally I finished. After 8 seemed to be a hundred years, I found my audience applauding. I made it! From then on, my fear for talking before an audience disappeared. Actually with my confidence building up, I now turn to be a great speaker. Looking back, I know the 9 (great)difficulty on our way to success is our fear; overcome it, 10we will be able to achieve our goals.。