Укажите в каждом из них модальный глагол или его эквивалент.
1. At the end of the course all the students will have to take a test.
2. You should think very carefully before making such an important decision
3. He didn’t know how to use the machine. I had to show him.
4. We took an exam yesterday. I could answer six questions out of ten.
1. will have to
3. had to