English Grammar Tests-Elementary Level's archive Modal Verbs 1.I go to see the doctor last week because I was very ill. must must to had to 2.I could bought that car but I didn't have enough money to pay for the petrol. had have have to 3.I go now because I am already late for my class. must had have to 4.I may able to come to your party if I have the time. be being being to 5.Do you clean the house every day or every week? must have have to 6.I speak French without a problem now because I have had many lessons. may can have 7.They do their homework today because it is a holiday at the school. must not don't have don't have to 8.I help you with your shopping because you have a lot of bags. ought ought to thought 9.When will you come and see us in our new house? can be able to must 10.I may go to Paris next week because there is a very big exhibition there. have have to had . English Grammar Tests-Elementary Level's archive Modal Verbs 1.I go to see the doctor last week because I was very ill.