Exercise 1
Put in must or can’t.
1 You’ve been travelling all day. You ……………………. be tired.
2 That restaurant ……………………. be very good. It’s always full of people.
3 That restaurant ……………………. be very good. It’s always empty.
4 I’m sure I gave you the key. You ……………………. have it. Have you looked in your bag?
5 I often see that woman walking along this street. She ……………………. live near here.
6 It rained every day during their holiday, so they ……………………. have had a very nice time.
7 Congratulations on passing your exam. You ……………………. be very pleased.
8 You got here very quickly. You ……………………. have walked very fast.
9 Bill and Sue always stay at luxury hotels, so they ……………………. be short of money.
Answers
1
1 must
2 must 6 can’t
3 can’t 7 must
4 must 8 must
5 must 9 can’t
Exercise 2
Complete each sentence with a verb (one or two words).
1 I’ve lost one of my gloves. I must ……………………. it somewhere.
2 Their house is very near the motorway. It must ……………………. very noisy.
3 Sarah knows a lot about films. She must ……………………. to the cinema a lot.
4 I left my bike outside the house last night and now it’s gone. Somebody must……………………. it.
5 ‘How old is Ted?’ ‘He’s older than me. He must ……………………. at least 40.’
6 I didn’t hear the phone ring. I must ……………………. asleep.
7 A: You’re going on holiday soon. You must ……………………. forward to it.
B: Yes, it will be really good to get away.
8 The police have dosed the road, so we have to go a different way. There must ……………………. an accident.
9 I’m sure you know this song. You must ……………………. it before.
10 There is a man walking behind us. He has been walking behind us for the last 20 minutes. He must ……………………. us.
Answers
2
1 have dropped
2 be
3 go
4 have taken / have stolen / have moved
5 be
6 have been
7 be looking
8 have been
9 have heard
10 be following
Exercise 3
Read the situations and use the words in brackets to write sentences with must have and can’t have.
1 We went to their house and rang the doorbell, but nobody answered. (they / go out)
…………………….…………………….
2 Sarah hasn’t contacted me. (she / get / my message)
…………………….…………………….
3 The jacket you bought is very good quality. (it / very expensive)
…………………….…………………….
4 I haven’t seen our neighbours for ages. (they / go away)
…………………….…………………….
5 I can’t find my umbrella. (I / leave / it in the restaurant last night)
…………………….…………………….
6 Amy was in a very difficult situation when she lost her job. (it / easy for her)
…………………….…………………….
7 There was a man standing outside the cafe. (he / wait / for somebody)
…………………….…………………….
8 Rachel did the opposite of what I asked her to do. (she / understand / what / said)
…………………….…………………….
9 When I got back to my car, the door was unlocked. (I / forget / to lock it)
…………………….…………………….
10 I was woken up in the night by the noise next door. (my neighbours / have / a party)
…………………….…………………….
11 The tight was red, but the car didn’t stop. (the driver / see / the red tight)
…………………….…………………….
Answers
3
1 They must have gone out.
2 She can’t have got my message.
3 It must have been very expensive.
4 They must have gone away.
5 I must have left it in the restaurant last night.
6 It can’t have been easy for her.
7 He must have been waiting for somebody.
8 She can’t have understood what I said. or She couldn’t have understood what I said.
9 I must have forgotten to lock it.
10 My neighbours must have been having a party.
11 The driver can’t have seen the red light. or The driver couldn’t have seen …
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