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What are 3 common rules for all modal verbs
same in all persons, followed by to+infinitive, form negative and question with no auxiliary
What modals do we use for asking, giving and refusing permission?
Can, could,may
What is the difference between can and could?
Could is more polite
Make a sentence with a modal verb to offer help
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What does the verb must mean in an affirmative statement?
obligation
What does the verb must mean in a negative statement?
prohibition
What verb do we use if we speak about absence of obligation?
Don't have to
Are must and have to similar? In what case?
Yes, in affirmative statements
What is the difference between need to as the main and modal verb?
It doesn't need an auxiliary and is followed by bare infinitive
Make a negative sentence using 'need to' as a modal verb
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Make a negative sentence using 'need to' as the main verb
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What is the past form of must?
had to
What do we use can, could, will and would for?
to ask a favour or make a polite request
