Luyện ngữ pháp - Destination C1 and C2 - (Unit 9: Grammar - Modals and semi-modals)


Permission
Asking for permission may, could, couldn't, can, can't Can I finish watching this before I go to bed?
Giving/refusing permission may, may not, could, couldn't, can, can't No, you can't.

Watch out!
• May is more polite and formal than could, and could is more polite and formal than can.

• We don't usually use modals to talk about past permission. We can use was/were allowed to.
✓ We were allowed to buy one comic each.

• However, we do use could to talk about past permission in reported speech. (see Unit 25 for more information)
✓ Mum said we could buy one comic each.

Form - Ability Form - Advice


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