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Do we add -s or -es to a modal verb?
no, never
What verb form comes after a modal verb?
infinitive without to
EXCEPTION TO RULES: Which modal verb is followed by 'to'?
ought
Which modals verbs are used to show rules and obligation?
must / have to
What is the past or future form of must?
had to / will have to, etc.
What kinds of rules do you have at school?
...
What kind of rules are there at the library?
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What kind of rules are there at the cinema?
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What kind of rules are there at the water park?
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Do 'have to' and 'don't have to' have same meaning?
No! 'have to' shows obligation, 'don't have to' shows no obligation, it isn't necessary
When something is the right thing to do, which modal verb do we use?
should
How do you use 'should' in the past?
should have + past participle
What should you do if you see an injured animal on the street?
...
Which modal do we use for necessity?
need/needn't
COMPLETE THE SENTENCE: Kate ________ get up early on Saturday because it's her day off.
doesn't have to
COMPLETE THE SENTENCE: You ________ be at least 1.3m high to ride this rollercoaster.
must
