Task 1. Put in the gaps the correct modal verb: can, could, have to, must.
1. Kelly count when she was six.
2. My brother ___ send the invitations if he wants his friends to come.
3. They get on the train right now because they are late.
4. Sam understand the task because he has a headache.
5. I win the competition because I have been preparing for this the whole year.
6. My mum is very tired. She … go to bed earlier.
7. The teacher says we … pay more attention to our pronunciation.
8. Jack’s room is in mess. He … tidy it.
Task 2. Rewrite the sentences using the correct modals: may/might, must, can’t, could .
1. Sam usually phones her little sister. I suppose he will phone her today.
2. She doesn’t know if she meets her teacher.
3. We don’t think the plane arrives on time in such bad weather.
4. My dad doesn’t think that the situation is so difficult.
5. Students are not sure if the teacher is still at school.
6. Maybe our parents will give us some good advice.
7. It’s certain that your cousins are of the same height.
8. Nick promised to buy a cake.
