English Modals of OBLIGATION, Definitions and Examples

The main verbs of obligation are; MUST, HAVE TO, SHOULD. The past of have to / has to is had. Must is for personal obligations. Have to is for general obligations.

Example Sentences

• You must stop here.
• You have to wear a
  seatbelt when you drive.
• You must answer at least one question.
• You should call Mary. I know she misses you a lot.
• She looks sick. She should go home.
• I must do some work.
• You shouldn’t have smoked.
• I have to return the book now.
• I had to wear a school uniform when I was a child.