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Modal verbs
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It is his obligation to return the book to the library.
He has to/ must return the book to the library.
Oops!
Okay!
He is not allowed to drink caffeine to cure this illness.
He can’t/ mustn’t drink caffeine to cure this illness.
Oops!
Okay!
It isn’t necessary to sleep more them 8 hours for adults.
Adults don’t have to sleep more than 8 hours.
Oops!
Okay!
It isn’t possible to speak on phone during the lesson ( we)
We can’t/ mustn’t speak on hoe during the lesson.
Oops!
Okay!
It isn’t necessary to speak Japanese for Jack.
Jack doesn’t have to speak Japanese.
Oops!
Okay!
It is better for you to stay at home. You look sick.
You should stay at home. You look sick.
Oops!
Okay!
You are not allowed to drink alcohol.
You can’t/ mustn’t drink alcohol.
Oops!
Okay!
Is it necessary to pay the fine ? ( She)
Does she have to pay the fine?
Oops!
Okay!
It is her obligation to cook for her husband.
She has to/ must cook for her husband.
Oops!
Okay!
It’s necessary to turn your phone off.
You have to/ must turn your phone off.
Oops!
Okay!
It isn’t possible to cheat during the test for us.
We can’t/ mustn’t cheat during the test.
Oops!
Okay!
It’s your obligation to pay bills at the end of month.
You have to/ must pay bills at the end of month.
Oops!
Okay!
It isn’t necessary to pay by cash for Ann
Ann doesn’t have to pay by cash.
Oops!
Okay!
It isn’t necessary to lend him money if you don’t want to.
You don’t have to lend him money if you don’t want to.
Oops!
Okay!
Is it necessary to give up smoking? ( you)
Do you have to give up smoking?
Oops!
Okay!
It isn’t possible for us to cheat during the test.
We can’t/ mustn’t cheat during the test.
Oops!
Okay!
This dress doesn’t suit you. It is better not to wear it. (You)
This dress doesn’t suit you. You shouldn’t wear it.
Oops!
Okay!
They are allowed to eat sweets.
They can eat sweets.
Oops!
Okay!
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