have: introduction

Have is used in several different ways:

a. as an auxiliary verb, to make perfect verb forms (see here)

• Have you heard about Daniel and Corinne?
• I remembered his face, but I had forgotten his name.

b. to talk about actions and experiences (see here)

• I’m going to have a bath.
• What time do you usually have breakfast?

c. to talk about possession, relationships and other states (see here)

• They have three cars.
• Have you (got) any brothers or sisters?
• Do you often have headaches?

d. with an infinitive, to talk about obligation, like must (see here)

• I had to work last Saturday.

e. with object + verb form, to talk about causing or experiencing actions and events (see here)

• He soon had everybody laughing.
• I must have my shoes repaired.
• We had our car stolen last week.

note

For contractions (I’ve, haven’t, etc), (see here).

For weak forms, (see here).

For had better + infinitive, (see here).