have (got) to

We use have (got) + infinitive to talk about obligation.
The meaning is similar to must. Sorry, I’ve got to go now.
Do you often have to travel on business?

The forms with got are common in an informal style in present-tense verb forms. Compare:

    I’ve got to go to London tomorrow.
    I had to go to London yesterday. (NOT / had got to . . . )

We do not use goMorms to talk about habits or repeated obligations. Compare:

    I’ve got to write a financial report tomorrow.
    I have to write financial reports at the end of every month.