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1. I will …………….. do my homework tonight.(must, have to, should)
2. She ………………. go alone yesterday. ( must, had to, can)
3. You …………… go to school on time. (should, ought, can)
4. You ………………watch TV all day. (ought to, ought not to, have to)
5. I’m sorry , you ………………..smoke here. (mustn’t, don’t have to, should)
I. Make questions for the following sentences. Use the given question words.
1. I had to go to the police station last week. (why)
Why did you have to go to the police station last week?
2. They must leave soon. (when)
When must they leave?
3. Jane has to go away for a long time. (How long)
How long does jane have to go away ?
4. You ought to practice English frequently.( How often)
How often do I ought to practice English?
5. We have to go home early.(What time)
What time do you have to go home?
6. Children mustn't see that film.(Why)
Why mustn't children see that film?
7. He'll have to go somewhere for a few days.(where)
where will he have to go?
8. You should do something to help homeless people.(What)
what should I do to help homeless people?
1. must/ have to/ need to
2. should/ shouldn't
3. mustn't
4. don't have to/ don't need to
1. We use MUST to say something is necessary because of a situation or a rule.
We use HAVE TO and NEED TO when the speaker feels that it is very important to do something, or when we talk about written rules.
2. We use SHOULD and its negative form SHOULDN'T to give advice, or to say something is a good or bad idea.
3. We use MUSTN'T to talk about something that is prohibited.
4. We use DON'T HAVE TO and DON'T NEED TO to say something isn’t necessary.
chia động từ và nêu dấu hiệu để chia động từ đó
1 the movie starts (start)at 8.15 this evening
2 We (have) are going to have a party next Saturday. Would you like to come?
3 when i last (see)saw him he (live)lived in london he (tell) told me then that he think of immigrating (immigrate) to australia may well to do (do) so by now
4 (be)are you cut off while i am talking (talk )to you just now. are You( be) ? i (think) think something must (go) have gone wrong with telephone
1. You mustn't cheat in exams.
2. If you need help, you should talk to your teacher.
3. I’m not thirsty, so I don’t need to stop and have a drink.
4. You don’t have to do this extra homework. It’s your choice.
5. We must arrive on time to school every day.
6. Rosie has to catch the next bus.
16. the phone has been ring ing for a minute. Noone …………at home(must have been/ can have been/ should have been/ none of these)
17. she’s fainted. Throw some water on her face and she ………. Come round.(has to/ may/ must/ can have)
18. ………..you please refrain from smoking while the lecture is in progress? (May/ Might/ Would/ Should)
19. I ……………… persuade him as I said.(wasn’t able to/ can’t/ mustn’t/ ought not)
20. I’m sorry to bother you while you’re working, but I …………ask you a question.(can/ had to/ must/ may)
21. He couldn’t have mean it seriously. He ……….laughed at you. (would/ couldn’t/ had/ must have)
22. we …….ensure the telegram arrives in time. (had to/ must/ ‘d rather/ might)
23. he ……..keep his family because his wages were too low. (couldn’t/mustn’t/ can’t/ didn’t have to)
24. the sea was too rough that we …………swim. (couldn’t/can’t/won’t/wouldn’t)
25. …………make an appointment to see the doctor? (May I / Could I / Will I/ Shall I )
26. Perhaps there ………. A good pro gram on the radio. (might be/ will be/ can be/ should be)
27. I ……go swimming when I was young. (a. could/b.would./ c. used to/d. both b and c)
28. ………..take this letter to the post office, please?(May you/ Must you/ Would you/none of these)
29. in our family my father ………sit at the top of the table. (used to/ had to/ ought to/must)
30 Do it as well as you ……………. (must/ will/ can/ have to)
31. I …………swim in this water: it is much too cold.(mightn’t/ mustn’t/ can’t/ don’t have to)
32. you …………… imagine my surprise when I heard the news. (can/ ought to/ will/ all of these)
33. you do some work instead of sitting there reading the paper. (would rather/ ought to/ won’t/ don’t have to)
34. be careful how you hold that jug; it ……….break easily.(may/ ought to/will/ might)
35. I’m not sure where to go for my holiday, but I ……..go to China. (should/ may/ have to/ needn’t)
36. we had free tickets, so we ……….pay to get into the concert. (didn’t have to/ couldn’t/mustn’t/ shouldn’t
1.I....could.....(can/could) swim when i was 10
2.You....ought....(ought/should) to study harder if you want to get good marks
3.It's going to rain.You.....ought to....(ought to/can) take an umbrella with you
4.The building is burning.We....must....(can/must) get out of it now
5.I ....can't....(can't/ couldn't) dance now but i could dance very well when i was 7
6.You....should...(should/ought to) not stay up late.It's harmful to your health
7.He....ought not to....(ought not to/can’t) drive too fast.It’s dangerous
8.I....must.....(can’t/must) finish my assignment today or i will be punished
1. have to
2. must
3. shouldn't
4. don't have to
5. should
6. have to
7. mustn't
8. should
9. don't have to
10. should
1. Children must / have to start school when they are five.
2. In many countries, you should / must wear a seat belt in the car - it’s the law.
3. I know you like sugar but you shouldn’t / don’t have to eat quite so much - it’s bad for you.
4. I’m not working tomorrow, so I mustn’t / don’t have to get up early.
5. The manager suggested that we have to / should try to find another hotel.
6. Kids should / have to wear a life vest. That’s bur regulation.
7. You mustn’t / don’t have to smoke in here; smoking isn’t allowed in the airport.
8. You must / should hand in your homework on Tuesday or your mark will be zero.
9. You have to / don’t have to dress up for the party. Wear whatever you feel comfortable in.
10. You should / have to ask the teacher to help you if you don’t understand the lesson.
ought to
ought to