Must (have) and Can't (have) Exercises

UNIT 27   Must (have) and Can't (have)  Exercises

27.1   Complete these sentences using must (have) . . . , couldn't (have) . . . , or can't (have) . . . .

Examples: "Is he American?"     "Yes, he must be American.''
                   "Did she see you?"    ''No, she can't have seen me.''

1.   "Are they married?''  ''Yes, they must______________________________''

2.   ''Is he serious?"    ''No, he can't_______________________________''

3.   ''Were they in a hurry?''    "Yes, they_________________________________________''

4.   "Does Ann know a lot of people?''   ''Yes, she_____________________________________________''

5.   ''Did Tom know about the plan?''    ''Yes, he__________________________________________''

6.   ''Do they have much money''    "No, they___________________________________________''

7.   ''Was she driving carefully?''    "No, she___________________________________________''

8.   ''Are they waiting for somebody?''    ''Yes, they__________________________________________''


27.2   Complete these sentences with must or can't + an appropriate verb.

Example: You've been traveling all day. You must be very tired.

1.   Brian has three houses, six cars, a yacht, and a helicopter. He___________________a lot of money.

2.   (The doorbell rings.) Iwonder who that is. It_________________be. Jim. He said he would come after 7:00 and it's only 6:30 now.

3.   I wonder why Sue isn't at work today. She___________________sick.

4.   John seems to know a lot about history. He____________________a lot of books.

5.   Jane's putting on her hat and coat. She__________________out.                        


27.3   Read each situation and write a sentence with must have or can't have. Use the words in parentheses ( . . . ).
Example: The phone rang but I didn't hear it. (I must be asleep)
I must have been asleep.
1.   That dress you bought is very good quality. (it must/be/very expensive)
It must_______________________________________________________

2.   I haven't seen Jim for ages. (he must/go/away) He________________________________________

3.   I wonder where my umbrella is. (you must/leave/it on the bus)
_________________________________________________________________________________

4.   Don passed the exam. He didn't study very much for it. (the exam can't/be/very difficult)
_________________________________________________________________________________

5.   She knew everything about our plans. (she must/listen/to our conversation)
_________________________________________________________________________________

6.   Dennis did the opposite of what I asked him to do. (he can't/understand/what I said)
_________________________________________________________________________________

7.   When I woke up this morning, the light was on. (I must/forget/to turn it off)
_________________________________________________________________________________

8.   I don't understand how the accident happened. (the driver can't/see/the red light)
_________________________________________________________________________________



Answers

27.1

1- be married.
2- be serious.
3- must have been in a hurry.
4- must know a lot of people.
5- must have known about it.
6- can't have much money.
7- can't have been driven carefully.
8- must be waiting for somebody.

27.2

1- must have.
2- can't be.
3- must be.
4- must read.
5- must be

27.3

1- have been very expensive.
2- must have gone away.
3- You must have left it on the bus.
4- The exam can't have been very difficult.
5- She must have been listened to our conversation.
6- He can't have understood what i said.
7- The driver can't have sseen the red light.