Modal verbs

At our school we ... a uniform.

• mustn't

• doesn't have to

• don't have to

• shouldn't

Answer explanation

NO NECESSITY.

Soldiers ... obey orders.

• must

• should

• has to

• mustn't

Answer explanation

OBLIGATION.

You ... read this book, it's fantastic!

• must

• should

• need to

• ought to

Answer explanation

ADVICE (ought to=should)

You ... go shopping today. We don't need anything.

• mustn't

• shouldn't

• don't need to

• don't have to

Answer explanation

NO NECESSITY.

There's a test tomorrow. I think I ... study now.

• don't have to

• don't need to

• mustn't

• should

Answer explanation

ADVICE.

You ... talk in an exam.

• shouldn't

• mustn't

• don't have to

• don't need to

Answer explanation

PROHIBITION.

Children ... swim in the swimming pool without an adult.

• can't

• shouldn't

• may

• mustn't

Answer explanation

mustn't = PROHIBITION

can't = IMPOSSIBILITY

... you ski well?

• May

• Might

• Can

• Must

Answer explanation

ABILITY.

You're ill. You ... drink lots of liquids.

• must

• can

• can't

• mustn't

Answer explanation

ABILITY.

My brother ... run very fast. He's very slow.

• mustn't

• must

• can

• can't

Answer explanation

IMPOSSIBILITY.