Unit 28: CAN

Can is a modal verb. Unit 27 shows you how to make correct sentences with it. This unit shows you when you can use it.

Ability

EXAMPLES:
She can assist a customer.
He is an employee but he cannot make a sale.

NOTICE: cannot is one word

EXAMPLES:
Can you see the sale sign?
I can't see the small one.

EXAMPLE: I'm afraid I can't see you this week but I can next week.

NOTICE: also be able to (Unit 36)

EXAMPLE: Saturdays can be be very busy days to shop.

EXAMPLES:
You can't be shopping now, you don't have any money.
They can't have got their money back. They didn't have their receipts.

NOTICE: use must (Unit 33) for strong probability

EXAMPLES:
You cannot return merchandise without a receipt.
Customers can return merchandise with a receipt.

NOTICE: more friendly than may (Unit 30)

EXAMPLES:
Can I pay by debit?
Can I have a receipt please?

NOTICE: could (Unit 29) is more polite

EXAMPLES:
Can you give me a hand?
Can you tell me the time?

NOTICE: also could (Unit 29); also will (Unit 31)

EXAMPLES:
Can I help you?
Can I get you a larger size?

NOTICE: also will (Unit 31); also shall (Unit 31)