Certainty, Possibility, Impossibility and Advisability


Grammar
 

 

A) Rewrite the sentences using the modals of CERTAINTY, IMPOSSIBILITY and
POSSIBILTY:

1. Perhaps Jane will lend Tom some money.
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2. Perhaps Jane lent Tom some money.
…………………………………………………………………………………….
3. It is possible that she won’t invite you to the party.
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4. It is possible that she didn’t invite him to the party.
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5. Perhaps she is asleep.
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6. Perhaps she was asleep.
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7. I’m sure he isn’t tired.
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8. I’m sure he wasn’t tired.
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9. It is impossible that Mary knows my phone number.
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10. It is impossible that Mary knew his address.
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11. I’m sure she reads adventure books a lot.
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12. I’m sure she wrote to the bank.
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13. Maybe those children are lost.
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14. Maybe those children were lost.
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15. Perhaps Mary is feeling comfortable.
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16. I’m sure she is driving carefully.
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17. It is impossible that Lucy is studying in her room.
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18. I’m sure he isn’t helping his father now.
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19. It is possible that people will be traveling between the planets.
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B) Rewrite using modals to show CERTAINTY, POSSIBILITY, IMPOSSIBILITY:

1. Perhaps Peter lended some money to Linda.
……………………………………………………………………………………..
2. It is impossible that Ken saw me because he wasn’t wearing his glasses.
……………………………………………………………………………………..
3. Perhaps Martin didn’t receive my letter because he didn’t reply.
……………………………………………………………………………………..
4. I’m sure he knows about the new project.
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5. It’s impossible that he forgot the meeting. Because I called him this morning.
……………………………………………………………………………………..
6. It’s possible that she will move to her new flat next week.
……………………………………………………………………………………..

C) Fill in the blanks with the modal verbs to show CERTAINTY, POSSIBILITY,
IMPOSSIBILTY:

1. He drank two glasses of water, he ……………………………………………...(be) thirsty.
2. He isn’t more than 15 years old, he ……………………………………….(have) a driving licence.
3. He ………………………………………….. (watch) TV in his room, because there isn’t any noise coming.
4. The solution …………………………………… (be) correct, because I looked up the answer key.
5. A: Do you smell fish?
B: Yes. Someone ……………………………….. cooking fish.
6. I’m not sure, he ………………………………… (be) an actor, he is very handsome and rich.

D) Make sentences using CERTAINTY, POSSIBILITY and IMPOSSIBILTY:

1. She / not / work / yesterday, / it / Sunday.
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2. They / not / lose / the match. / They / play / well.
…………………………………………………………………………………………….
3. There / be / election / early / next year, / because / we / government / problems.
…………………………………………………………………………………………….
4. Betty / fail / not / last exam. / She / do / all the answers / correctly.
…………………………………………………………………………………………….

E) Fill in the blanks using the verbs expressing CERTAINTY, POSSIBILITY and
IMPOSSIBILITY:

1. Her face is red. She ……………………………… be telling a lie.
2. He is working hard. He ……………………………….. be ill.
3. A: Have you done this pozzle?
B: Yes, I’ve got the same answer as you. It ……………………………... be correct.
A: Well, the answer in the book is different. So we ……………………….. be right.
4. A: Are John and Mary married?
B: They …………………………….. be married. They have rings on their fingers.
5. You’ve been resting all day; you …………………………………… be tired.
6. I can hear Jane speaking but she’s alone in the room. She ……………………………… be talking to a friend on the phone.
7. A: Tom has been in his room for over an hour. What do you suppose he is doing?
B: I don’t know. He …………………………………….. be reading a book or sleeping, but he ………………………………….. be studying because it is too late.



8. A: I need to call Howard. Do you know which hotel he’s staying at in Boston?
B: Well, he ………………………………………. (stay) at the Holiday Inn, but I’m not sure. I think he …………………………………… (stay) at the Hilton, because it’s too far away from the city center.
9. A: Do you smell smoke?
B: I sure do. Something ……………………………………….. (burn).
10. There ……………………………………. (not / be) a meeting on Friday because the director is ill.

F) Rewrite the following sentences using modal verbs used for expressing CERTAINTY,
POSSIBILITY and IMPOSSIBILITY:

1. Tom gets excellent grades. I’m sure he is very intelligent.
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2. Perhaps Tony is in the sports center.
………………………………………………………………………………..
3. It’s possible that Liz won’t come to the party.
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4. It’s possible that Rose is studying to be a lawyer.
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5. It’s impossible that he is Canadian; I’ve ever seen his identity card.
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6. I’m sure he goes to the theatre a lot.
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7. I’m sure long skirts aren’t in fashion this year.
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8. Perhaps she won’t be here tomorrow.
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9. Their baby-boy is ill. It is impossible that they are going to the party.
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10. I’m sure he is taking the money to the bank.
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11. Perhaps people will be living on the moon in the future.
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12. It is possible that it will rain this afternoon
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