Present Deduction
Which modal verbs do we use when we aren't sure about something? (3 answers)
might - may - could
Change the sentence using must: I'm almost certain Mom is the winner.
Mom must be the winner.
Change the sentence by using can't: I am sure it isn't possible that she's the thief.
She can't be the thief.
They are on a trip to England. Their house ____ be empty.
must
Change the sentence by using must: I can't believe you've been waiting all this time! I'm sure you are really bored..
I can't believe you've been waiting all this time! You must be really bored..
Change the next sentence by using can't: Look how much sugar and salt it's got in it! I'm pretty sure it isn't good for your health.
Look how much sugar and salt it's got in it! It can't be good for you.
Put the words in the correct order: he / suit! / about / so / his / be / embarrassed / must
He must be so embarrassed about his suit!
Change the next sentence by using must:His car's not here. I'm 100% certain he has gone out.
His car's not here. He must be out.
Change the next sentence by using can't: I'm pretty sure it isn't him. He's on holiday until next week.
It can't be him. He's on holiday until next week.
Put the words in the correct order: can't / exam / studied / this / a lot! / be / his / he
This can't be his exam. He studied a lot!
Change the sentence by using must She's won prizes for her research. She's most likely really intelligent.
She's won prizes for her research. She must be really intelligent.
Change the next sentence by using couldn't: I'm sure you won't pass the test without studying anything.
You can't pass the test without studying anything.
Correct and combine: They might not be at university. I've seen them at the supermarket.
They can't be at university because I've seen them at the supermarket.
Change the sentence by using must: It's very likely Eddie is sharing his personal information with the bank.
Eddie must be sharing his personal information to the bank.
Is this correct or incorrect? That can't being them. Their car's yellow.
incorrect