Modal Verbs of Probability
Put in 'must + infinitive' (for something that's likely about the present) or 'must + have + past participle' (for something that's likely about the past):
Put in 'must + infinitive' or 'must + have + past participle':
1) Keiko always does really well on exams. She ..... (study) a lot.
[ must study ]
2) That woman drives a very expensive car. She .......(have) a lot of money.
[ must have ]
3) You ........(practise) a lot before you gave your speech. It was really good.
[ must have practised ]
4) When Lizzie got home ...... yesterday there were flowers on the table. Her husband
(buy) them.
[ must have bought ]
5) Where is my purse? I saw it earlier, so it ........(be) in this room.
[ must be ]
6) Sarah couldn't find her glasses. She thought she .......
(leave) them at her office.
[ must have left ]
7) It .........(be) cold outside. That man in the street is wearing a coat.
[ must be ]
8) All my plants .........(be) dead! I forgot to water them before I went on holiday.
[ must be ]
9) Susie is so late! She .....(miss) the train!.
[ must have missed ]
10) There's rubbish all over ...... my garden! A fox
(be) in the bin.
[ must have been ]
11) Anna has a huge library in her house. She ........(love) books.
[ must love ]
12) Oh no, I don't have my keys! I ........(leave) them in the taxi.
[ must have left ]
13) When Lucy got home, she found the ice cream had .......... melted. It (be) too hot in the car.
[ must have been ]
14) If you haven't eaten all day, you .........(be) hungry.
[ must be ]
15) Jimmy and Louisa ......(be) very tired. They have a new baby.
[ must be ]
16) It .........(rain) a lot in the night. There are puddles everywhere.
[ must have rained ]
17) David .......(be) happy. His girlfriend just agreed to marry him.
[ must be ]
18) What an amazing kitchen you've got! You .....(like) cooking.
[ must like ]
19) John .........(eat) all the biscuits! There are none left.
[ must have eaten ]
20) When I got up this morning, the kitchen was spotless. Lily .......(tidy) it before she went to bed last night.
[ must have tidied ]
Models of Probability 2
put in 'must' or 'can't'
1) Why is that man looking around like that? He ......be lost.
[ must ]
2) That woman ........be a doctor! She looks far too young.
[ can't ]
3) John always fails the tests, even though he's clever. He ......
study enough.
[ can't ]
4) The food is really good at that restaurant. They ........have a great chef.
[ must ]
5) Who's that at the door? It .....be Susie - she'll still be at work now.
[ can't ]
6) This .......be John's house. This house has a red door and it's number 24, just like he said.
[ must ]
7) Julie .......have much money or she would buy a new car. Her old one is falling apart.
[ can't ]
8) He ........be at work now, can he? It's nearly midnight.
[ can't ]
9) What a lot of lovely flowers you have! You ......really like gardening.
[ must ]
10) David ........drink a lot of coffee. He's finished two packets already this week.
[ must ]
11) This .............be Jamie's coat. He's tall and this is tiny.
[ can't ]
12) Her life .........be easy. She has four children and very little money.
[ can't ]
13) Where's Lucy? She ......be at the library, as she often goes there at this time.
[ must ]
14) This bill ........be right! £50 for two cups of coffee!.
[ can't ]
15) Emma's amazingly good at the piano. She .......practise a lot.
[ must ]
16) The car in front is driving so slowly that I think they ......be looking for something.
[ must ]
17) You've already eaten enough for three people! You .....still be hungry!.
[ can't ]
18) This book
belong to the library. It's ...... certainly not mine.
[ must ]
19) It only takes three hours to fly from London to Sydney? That .......be correct!.
[ can't ]
20) There
be something wrong with the fridge! It's making a very ....... unusual noise.
[ must ]
Modal Verbs Exercises
Here's a list of all the modal verbs exercises
Modal verbs of ability exercise
Modal verbs of obligation exercise
Modal verbs of probability exercise
Past modals exercise 1 (could have, should have, would have)
Click here to return to the main modals page
Thanks for reading Modal Verbs of Probability
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