Past modals of deduction

For what do we use 'past modals of deduction'?

• To guess about the future.

• To guess about the present.

• To guess about the past.

We use must have + past participle when...

• we think it's possible that something happened.

• we feel sure about what happened.

• we think it's not possible that something happened.

We can use might have or may have + past participle when...

• we think it's possible that something happened.

• we feel sure about what happened.

• we think it's not possible that something happened.

We use can't have and couldn't have + past participle when...

• we think it's possible that something happened.

• we feel sure about what happened.

• we think it's not possible that something happened.

Which sentence is NOT a correct sentence?

• Erin may have missed the train.

• Erin must have missed the train.

• Erin can have missed the train.

Which sentence is NOT grammatically correct?

• Joseph must have forget about the party.

• He can’t have got lost!

• I may have left the form at home.

Which modal verb completes the following question correctly?

We ____ not have bought enough biscuits for everyone.

• should

• may

• must

Which sentence means:

Maybe John went to the shop.

• John may have gone to the shop.

• John must have gone to the shop.

• John might not have gone to the shop.