You can use has it in expressions such as 'rumour has it that' or 'as legend has it' when you are quoting something that you have heard, but you do not necessarily think it is true.

If someone has it in for you, they do not like you and they want to make life difficult for you.

If you have it in you, you have abilities and skills which you do not usually use and which only show themselves in a difficult situation.

If you have it out or have things out with someone, you discuss a problem or disagreement very openly with them, even if it means having an argument, because you think this is the best way to solve the problem.

You use have to when you are saying that something is necessary or required, or must happen. If you do not have to do something, it is not necessary or required.

You can use have to in order to say that you feel certain that something is true or will happen.

You use the forms have and has with a past participle to form the present perfect tense of verbs.

You use the form had with a past participle to form the past perfect tense of verbs.

Have is used in question tags.

You use have when you are confirming or contradicting a statement containing 'have', 'has', or 'had', or answering a question.

The form having with a past participle can be used to introduce a clause in which you mention an action which had already happened before another action began.

You can use have followed by a noun to talk about an action or event, when it would be possible to use the same word as a verb. For example, you can say 'I had a look at the photos' instead of 'I looked at the photos'.

In normal spoken or written English, people use have with a wide range of nouns to talk about actions and events, often instead of a more specific verb. For example people are more likely to say 'we had ice cream' or 'he's had a shock' than 'we ate ice cream' or 'he's suffered a shock'.

You use have to say that someone or something owns a particular thing, or when you are mentioning one of their qualities or characteristics.

If you have something to do, you are responsible for doing it or must do it.

You can use have instead of 'there is' to say that something exists or happens. For example, you can say 'you have no alternative' instead of 'there is no alternative', or 'he had a good view from his window' instead of 'there was a good view from his window'.

If you have something such as a part of your body in a particular position or state, it is in that position or state.

If you have something done, someone does it for you or you arrange for it to be done.

If someone has something unpleasant happen to them, it happens to them.

If you have someone do something, you persuade, cause, or order them to do it.

If someone has you by a part of your body, they are holding you there and they are trying to hurt you or force you to go somewhere.

If you have something from someone, they give it to you.

If you have an illness or disability, you suffer from it.

If a woman has a baby, she gives birth to it. If she is having a baby, she is pregnant.

You can use have in expressions such as 'I won't have it' or 'I'm not having that' to mean that you will not allow or put up with something.