Must and Can't (Deduction)
Secondary English Grammar · Future Forms and Modal Verbs · Lesson 28
Also known as: Must and can't deduction
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Lesson questions (14)
- You've been working all day. You ___ be tired.
Answer: must - She ___ be at home. Her car isn't there.
Answer: can't - They ___ have left already. The lights are off.
Answer: must - He ___ have seen me. He didn't say hello.
Answer: can't - That ___ be Ali at the door. I'm expecting him.
Answer: must - You ___ be serious! You're joking, aren't you?
Answer: can't - She knows a lot about films. She must ___ a lot of them.
Answer: watch - The streets are wet. It can't have rained.
Answer: False - He can't be hungry. He has just eaten.
Answer: True - You can't have been very worried.
Answer: False - Choose the correct sentence.
Answer: I lost my phone. I must have left it on the bus. - Choose the correct sentence.
Answer: That restaurant is always empty. The food can't be very good. - You must be cold. It's 35 degrees!
الخطأ:must· التصحيح: can't - She can't have forgotten. She's never late.
الخطأ:can't· التصحيح: must
About this lesson
“Must and Can't (Deduction)” is from Secondary English Grammar (Future Forms and Modal Verbs) and has 14 questions with answers. Sample questions: “You've been working all day. You ___ be tired.” and “She ___ be at home. Her car isn't there.”. Every question can be played in any Hessa Play game or activity.
Lesson words: must · can't · watch
How to use it in class
- Show the question on the board and let students think before the options appear.
- Split the class into two teams; every correct answer earns a point.
- Display it on the smart board, send it as homework by link, or play it solo or in two teams.
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Questions about this lesson
How do we use must for deduction?
When we are almost certain that something is true: He must be tired after the trip.
What is the opposite of must in deduction?
can't: She can't be at home, I just saw her in town. We do not use mustn't here.
How do we talk about the past?
must have / can't have + past participle: He must have forgotten. She can't have left.
Do students need an account to play this lesson?
No. The teacher shares the lesson link; the student types a first name and plays on a phone or computer, and the score reaches the teacher.
Which games suit this lesson?
You can play it in Gameshow Quiz, Mixed questions, Find & fix, Complete the sentence and the other games and activities on Hessa Play.