Ability
I ____ speak English!
I can speak English!
You ___ eat all your vegetables!
You must eat all your vegetables!
Can you help me, please?
It is almost 7am. The teacher ____ arrive soon.
It is almost 7am. The teacher should arrive soon.
He ____ swim when he was 5.
He could swim when he was 5.
Doctors ___ wear their uniforms every day.
Doctors have to wear their uniforms every day.
It is an informal way of ask for something.
Can
It is so dark. It ___ be 8pm
It is do dark. It must be 8pm
It represents an ability in the past.
Could
We ____ go to class. It is mandatory.
We have to go to class. It is mandatory.
Would you study with me?
It has a probability of 50%
May
I ____ help you! I am so busy today.
I can't help you! I am so busy today.
Maria _____ save some money.
Maria should save some money.
I ___ ____ help you! * present perfect *
I would have help you!
It has a probability of 100%
Must
Maria ____ go out. It was raining a lot.
Maria couldn't go out. It was raining a lot.
I ___ drive carefully because there were a lot of kids in the street.
I had to drive carefully because there were a lot of kids in the street.
I ____ watch your kids today, friend!
I will watch your kids today, friend!
It has a probability of 35% or less.
Might