Modal Verbs REVISION

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REMEMBER > All the auxiliary verbs except be, do and have are called modals. Unlike other auxiliary verbs modals only exist in their helping form; they cannot act alone as the main verb in a sentence.

Be, do, and have also differ from the other auxiliaries in that they can also serve as ordinary verbs in a given sentence.

The modal auxiliary verbs are always followed by the base form.

The modal verbs are:-

CAN / COULD / MAY / MIGHT / MUST /SHOULD /SHALL

Remember HAVE TO and BE ABLE TO are NOT  modal verbs, but are used to express obligation and ability in English

Modal	Example	Uses
Can/ Can’t	We can work it out. He can’t fix the pipe. Can I smoke here? He can’t be on holiday.	Ability / Possibility Inability / Impossibility Asking for permission Deduction
Could/ couln’t	Could I borrow your dictionary? Could you say it again more slowly? He could swim when he was 4.	Asking for permission. Request Ability in the past
BE ABLE TO	Sam won’t be able to come. Have you ever been able to play tennis? I’d love to be able to fly.	Ability/possiblity  in other tenses
Might	She might be outside.	Deduction
Must Mustn’t	We must go now. They mustn’t  play ball games there. She must be in her late twenties.	Necessity / Obligation Prohibition Deduction
Shall	Shall I help you with your luggage?	Offer
Should	We should solve this problem at once. I think we should  revise everything again. You shouldn't eat here.	Saying what’s right or correct Recommending action Advice
Have to	You have to drive on the left in Britain and in Australia. She has to wear a uniform at work. Does Peter have to get up early on Saturdays?  You don’t have to pay for this She doesn’t have to work on Friday afternoons.	‘External’ obligation Not necessary

Adapted from:  http://www.learnenglish.de/grammar/verbmodal.htm

PRACTICE (Click on the activities)

Activity 1
Activity 2
Activity 3