have: introduction

We can use have in several different ways.
a. auxiliary verb

    Have you heard about Peter and Corinne?

b. to talk about possession, relationships, and other states:

    I’ve got a new car.
    Have you got any brothers or sisters?
    Do you often have headaches?

c. to talk about actions:

    I’m going to have a bath.
    We’re having a party next weekend.

d. to talk about obligation (like musty.

    I had to work last Saturday.

e. to talk about causing things to happen:

    He soon had everybody laughing.
    I must have my shoes repaired.

The grammar is not the same for all of these different meanings of have. For details, see the next five sections.