第1个回答 2009-01-02
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
第2个回答 2009-01-02
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.
第3个回答 2009-01-02
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