1. George is able to speak French very well.
2. The students have permission to speak to the president.
3. It is possible that George will go to Chicago.
4. Sue ought to write to her parents.
5. Paul has to take an exam next week.
6. John is able to swim now.
7. Paul and George are going to play tennis tomorrow.
8. I conclude that the girls are studying.
9. It is possible that May is home now.
10. We have to get up at six tomorrow morning.
1. Juan is from Mexico. He must speak Spanish.
2. George plays the piano very well. He must practice a lot.
3. Paul recently finished high school. Therefore, he must be about eighteen years old.
4. George knows everyone in the class. Therefore, he must know Paul.