Expressing DeductionExpressing Deduction

- When you are 100% sure100% sure, use MUST. She must have a lot of money. She

drives a Ferrari.

- If you are not very surenot very sure, use MAY:There’s someone outside, it may be

John. He hasn´t answered. He may not have

seen my message.

- If you are not sure at allnot sure at all, use MIGHT:

He might know the answer.Real Madrid might win the Spanish

league.

- If you are sure something is something is impossible/not trueimpossible/not true, use CAN´T:

He can´t be ill. I saw him at a party last night.