Modals are also helping verbs. They are used to express permission , possibility, ability, etc.
Model verbs include, can, could, may ,might, will, would, shall, should.
Examples:
You can take a taxi.
I could play tennis when I was younger.
May I come in?
It might be quick to travel in a train.
Will you please give me your phone.
I would like to sign up for your workshop.
You should drive more carefully.