have to
Third Person
has to
Present Participle
having to
Past Tense
had to
Past Participle
had to
1
used to indicate an obligation or to emphasize the necessity of something happening
transitive
- I have to finish this report by the end of the day.
- We have to pay our bills before the due date to avoid late fees.
- We have to be at the airport two hours before the flight.
- They have to study hard for their exams next week.
- He has to pick up his kids from school at 3 PM.
2
to be certain about something happening or being true in a given situation
- There has to be a reason for the sudden change in behavior.
- It has to be a mistake; I never received that email.
- There has to be a solution to this problem; let's keep looking.
- It has to be true if so many people are talking about it.
- There has to be a logical explanation for the missing documents.