Rewrite the sentences by replacing the underlined expressions with the correct modal verb (couldn’t, can, need, needn’t, ought to, must). Make the necessary changes.
1. Richard has the ability to solve maths problems very quickly.
Richard …
2. It isn’t necessary to stay in the exam hall after you have completed the test.
You …
3. I advise you to seek help if you are having problems understanding something.
You …
4. Nia is a very well−behaved child. I doubt that she was nasty to the other children. Nia is a very well−behaved child.
She …
5. It is necessary for you to have a computer password.
You …
6. Students are obliged to be on time for class.
Students …
Expand these signs into full sentences.
1. No talking in the library
2. No mobiles in class
3. Tickets for the school play are now on sale
4. Do not run in the hallway
5. Report bullying
6. Exam in progress. Do not enter
Underline the correct modal verb.
1. You can / must raise your hand and wait before you ask a question.
2. Steven wants to go out with his friends but his mum said he needn’t / can’t go until he has finished his homework.
3. In Britain, all teens have to / may stay in school until they are sixteen years of age.
4. In the old days, teachers could / should hit students with a ruler if they misbehaved in class.
5. You mustn’t / don’t have to do this homework assignment, but those who do will get extra credit.
6. You should / need to ask your teacher if you require extra help with your studies.
7. In certain schools, students may / must stand when their teacher enters the room.
8. You should / might spend more time studying if you want to get good marks.
Complete the exchanges using perfect modals and the verbs in the list.
• offer
• bring
• miss
• study
• win
• help
1. A: I didn’t understand that chemistry lesson at all!
В: I … you if you had asked me!
2. A: You … to help carry your teacher’s bag.
В: I couldn’t. I had to go to football practice.
3. A: Have you returned my dictionary?
В: I … it back. I can’t remember. Check your bookcase.
4. A: I did so badly in my speaking test!
B: Well, you … more then!
5. A: I wonder why Tom looks so happy today.
B: He … first prize in the school art competition!
6. A: Tina should be here by now.
B: She … the bus.
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