Modal verbs (can, could, may, might, will, would, shall, should, must, ought to) add meaning to the main verb — expressing ability, possibility, obligation, permission, or advice. They never change form and are always followed by the base verb.
Practice
___ you swim when you were five years old?
I open the window? It's hot in here.
Put the words in the correct order:
You ___ wear a seatbelt in the car. It's the law.
I think itrain later, so bring an umbrella.
Put the words in the correct order:
We ___ finish the project by Friday — the deadline was moved up.
Heride a bike when he was only four.
Put the words in the correct order:
Look at those dark clouds — it ___ rain soon.