Modal Verbs Expressing Obligation

Which of the following modals indicates strong obligation?

• must

• mustn't

• should

Which of the following modals indicates no obligation?

• don't have to

• mustn't

• shouldn't

Which of the following modals indicates strong obligation in the past?

• didn’t have to

• had to

• should have

You _____ be late tomorrow! We have a lot of work to do.

• must

• mustn't

• shouldn't

The museum offers free ticket. You _____ buy for us.

• don't have to

• mustn't

• shouldn't

We ____ rush because we were given plenty of time to accomplish that.

• don't have to

• mustn’t

• shouldn't

When I was college, I _____ work part-time to help my parents in paying my tuition.

• didn’t have to

• had to

• should have

You ___ wear your uniform when attending online classes.

• must

• had to

• did not have to

My mom ____ pay for my tuition fee because I was a full scholar in college.

• don't have to

• didn't have to

• must