I stayed up too late last night, I ___ wake up this morning. Couldn't.
Couldn't.
My keys ________ be in the car. (dedução)
must
My father ______ learn to cook. (passado)
could
You _______ finish your work tomorrow. (dedução)
must
I _______ speak French well. (presente)
can
My sister ______ listen to our mother. (conselho)
should
We _______ find aliens on Mars.
might
I ______ not swim. (presente)
can
________ I ask a question? (permissão formal)
May
_______ I close the door? (formal)
May
You ______ chew gum in class. (proibição)
mustn´t
_______ you go with me to the party? (convite)
Would
I _____ go on vacation to Spain (muita chance)
may
Britney ___(play) the piano at the age of 7.
could play; ability.