I have

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 have to + (verb)

The words 'have to' describe something that needs to take place soon. It expresses certainty, necessity, or obligation.
Here are some examples:

"I have to switch schools."
"I have to use the telephone."
"I have to go to the bathroom."
"I have to leave."
"I have to unpack my bags."

You can also add the word 'don't' to suggest that someone is not required to do something.

"I don't have to switch schools."
"I don't have to use the telephone."
"I don't have to go to the bathroom."
"I don't have to leave."
"I don't have to unpack my bags."

I don't have time to + (verb)

The word 'don't' is a contraction of the words 'do not.' When adding 'have time to' you are simply stating that you have other obligations and all other things considered must wait.
Here are some examples:

"I don't have time to explain."
"I don't have time to eat."
"I don't have time to exercise."
"I don't have time to watch my favorite TV show."
"I don't have time to talk."

You can also use the phrase 'I don't' to express things you do not like, things you do not understand, or things you do not do.
Here are some examples:

"I don't eat meat."
"I don't like the rain."
"I don't understand Spanish."
"I do not understand what you are saying."
"I do not like scary movies."
"I do not like sports."

I have something + (verb)

When using the expression 'I have something' you are communicating that you possess something or need to do something that is unspecified or undetermined.
Here are some examples:

"I have something to complete."
"I have something to share with you."
"I have something important to tell you."
"I have something to encourage you."
"I have something to explain to you."
"I have something special planned for your birthday."
"I have something else to consider."
"I have something to apologize about."
"I have something to attend tonight."
"I have something to ask you."
"I have something fun for us to do."

from http://www.talkenglish.com/