De belangrijkste modal verbs en hun functies
*Obligation
Must/mustn't/Have to/ don't & doesn't have to
You must wear a helmet. I have to go now.
*Permission or possibility
Can/can't/Could/couldn't
I can play football. Could you help me?
May/Might (not)
You may leave early. It might rain later.
*Recommendation
Should/shouldn't
You should study for the test.