Shhhhh! You can/must listen to the teacher in class.
must
will or going to: A: We don’t have any bread. B: Really? I ....... (buy) some from the shop then.
will buy (instant decisions. In this sentence, speaker B made his decision during the conversation).
A: Why do you need to borrow my suitcase? B: Because I ........ (visit) my mother in Scotland next month.
am going to visit (intentions or plans - the decision was made before speaking).
People couldn't/shouldn't waste food! It's selfish.
shouldn't
I think Toy Story 1 was ....... (funny) than Toy Story 2.
funnier
I will travel to the USA if I ............. (have) enough money.
have
If you .................. (get) up early, you would catch the bus.
got
John is ............ (responsible) person that I know.
the most responsible
What a terrible cough! You should/would go to the doctor!
should
A: I’m really cold. B: I .......... (turn) the heating on.
will turn (instant decisions. In this sentence, speaker B made his decision during the conversation)
My sister thinks she's ............... (intelligent) than me, but I don't agree!
more intelligent
If Mary helped in the house, she .................. (get) more pocket money.
would get
If he ............ (have) some money, he ....................... (buy) a new car.
had / would buy
If I were you, I ................. (start) now.
would start
Susan will help you if she ................... (get) more pocket money.
gets
Sorry, sir! You can't/won't park here! The parking space is over there.
can't
will or going to: A: We don’t have any bread. B: I know. I ....... (buy) some. I took some money from your purse.
am going to buy (the decision was made before speaking).
He ............. (clean) the windows if you give him some detergent.
will clean
Avatar is ......... (good) film I've seen in my life!
the best
You are only 15 years old! You mustn't/couldn't drink alcohol.
mustn't
It's 3 o' clock. Jason can/must be working in the hospital.
must
A: All the lights have gone off! B: Don't worry. I ........ (take) a look!
will take (instant decisions. In this sentence, speaker B made his decision during the conversation.)
A: What are your plans after you leave university? B: I ........ (work) in a hospital in Africa
am going to work (intentions or plans - the decision was made before speaking).
Sorry, I'm busy. I can't/mustn't help you.
can't
Do you think the Harry Potter films are ....... (good) than the books?
better