She's a famous author - she (can't / must) have a lot of money.
must
I ( could / must) grow some flowers on my balcony, but I haven't decided yet.
could
Grandma (must / might)) have fruit for dessert, but she doesn't know yet.
might
A: We (must / have to) save the planet before it's too late! B: I agree. Earth needs our help!
must
That (mustn't / can't) be a carrot - it isn't orange!
can't
Will she (have to / must) go to the store for vegetables tomorrow?
have to
When you see a spider, you (mustn't / don't have to) kill it. That's mean.
don't have to
A: Is it an important meeting? B: No, it isn't. You (mustn't/ don't have to) be there.
don't have to
A: Is Grandpa sleeping? B: Yes, he is. We ( must / have to) be very quiet or he'll wake up.
must / have to
A: This is a very expensive book. You (mustn't/ don't have to) lose it. B: I promise I'll be careful.
mustn't
A: He (mustn't/ doesn't have to) wash the car. I've already washed it. B: OK, I'll tell him
doesn't have to
(Could / May) those birds be parrots?
could
A: Why was Carl at home yesterday? B: It was a holiday. He (mustn't / didn't have to) go to school.
didn't have to
Bea (could / might) not come this weekend. She's going to call me later.
might
He (doesn't have to / mustn't) become a farmer, but he wants to
doesn't have to
A: Why A: Why didn't you go to the café yesterday? Everyone was there. B: I wanted to, but I (must / had to) study for a test. must / had to study for a test.
had to
They (may I can't ) not get a cat until after the summer.
may
A: You (must /have to ) be careful when you cycle on busy roads. B: Don't worry, I'm always careful.
must
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