They _________ do their homework today because it is a holiday at the school.
I ______ speak French without a problem now because I have had many lessons.
Do you ______ clean the house every day or every week?
I may _________ able to come to your party if I have the time.
I _______ go now because I am already late for my class.
I could ________ bought that car but I didn't have enough money to pay for the petrol.