I have + (noun)

By using the words ‘I have’ you are informing someone of something you have possession of or have acquired.

Here are some examples:

“I have a cat.”
“I have a nice car.”
“I have a house.”
“I have a computer.”
“I have a headache.”

You may hear the words ‘cannot’ and ‘won’t’ used with ‘I have.’ By adding these you can express what you will not put up with or allow.

Here are some examples:

“I cannot have that behavior in my house.”
“I cannot have you over tonight.”
“I won’t have anything to do with that.”
“I won’t have it any other way

I have + (past participle)

Again, ‘I have’ shows possession or something acquired. By adding a past participle you are informing someone of a past or completed action done by you.

Here are some examples:

“I have done it.”
“I have heard that before.”
“I have driven a car.”
“I have forgotten the words.”
“I have read that book.”
“I have eaten at that restaurant before.”
“I have flown in an airplane.”
“I have forgiven you.”
“I have seen you before.”
“I have written a letter.”

I used to + (verb)

‘Used to’ expresses something that was done in the past, and is not usually done now.

Here are some examples:

“I used to develop websites.”
“I used to jog every day.”
“I used to paint.”
“I used to smoke.”
“I used to work from home.”
“I used to live in California.”
“I used to go to the beach every day.”
“I used to sing in a choir.”
“I used to like vegetables.”
“I used to start work at 6 o’clock.”