英语中have的用法

我是英语老师，帮帮你。
have to do 不得不做某事，to 为不定式，后接动词原形。
例：He has to wash his clothes this afternoon.
have/make/let sb/sth do 让某人或某物做某事， have 为使役动词，后接动词原形。
例：Our teacher often has/makes/lets us do much homework.
They always have the monkeys play with balls.
注意：在被动语态中，要改为to do 形式。
例：He is often made to cook supper.

have sth done 请或让某人（别人）做某事
例： The king had his tomb built .
I have already had my TV set repaired .
至于have sth to do，英语中没有这种用法。
祝你进步！

have to do表示不得不做某事，
have sth do是有某事要做，
have sth done是已经做完了某事。
have sth to do和have sth do应该是一个意思，不过我觉得貌似have sth do这个用法不太对，没看到过，倒是知道have sth doing，是正在做某事

通常与介词to 形成短语，have to=must是不得不；必须的意思，相当于一个情态动词，后面加动词原形，构成短语have to do sth.如：I have an apple.我有一个苹果。这的意思是“有”。I have to do my homework.我不得不做我的家庭作业。是必须的意思

have表示”使“时（即用做使役动词）的用法有三种：
1.have sb/sth do sth:表示使某人做某事。
例：The teacher has students do homework every day.
2.have sb/sth doing sth:表示使某人一直做某事
例：He has the horse running all day.
3.have sb/sth done:表示使某人被...
例：He has his hair cut by his father.
单数时，须把have改为has.

have to do表示不得不做某事
have sth done表示请别人帮自己做某事跟get sth done是一样的
have sth to do指有某事要做
have sb/sth do sth表示使某人做某事