PET Modal Verbs & Conditionals

Question 1

She _____ swim very well when she was a child.

Accepted Answer

could

Answer

'Could' expresses past ability, making it the correct modal here.

Question 2

You _____ wear a seatbelt when driving. It's the law.

Accepted Answer

must

Answer

'Must' expresses a strong obligation or legal requirement.

Question 3

_____ I open the window? It's very hot in here.

Accepted Answer

Could

Answer

'Could' is used to make a polite request for permission in formal or neutral contexts.

Question 4

He hasn't eaten all day. He _____ be very hungry.

Accepted Answer

must

Answer

'Must' is used to express a logical deduction based on available evidence.

Question 5

You _____ park here. It's a no-parking zone.

Accepted Answer

mustn't

Answer

'Mustn't' expresses a prohibition — something that is not allowed.

(PET) Preliminary English Test Practice Test