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ask是使役动词吗?
不是，是实义动词，使役动词是make,let,have中文意思是adv,使……。而ask中文意思是v. 询问，打听；要求，请求；邀请，约请 ；指望，期待 I'm too frightened to ask him now.现在我吓得不敢问他了。 Hey, can I just ask you something? 嘿，问你点事好吗？ I hoped he wouldn't ask me back.
ask sb后面可以跟句子吗?
可以接从句。ask的用法,ask sth. 问…… ask sb to do sth.让某人做某事ask for help/sth 请求帮助、要求某事物ask sb in/out 邀请某人出来、进来1.意思是：“要求、请求”时ask sb to do sth ,要求/请求某人做某事ask sb not to do sth ,要求某人不做某事2.意思为：“询问，查询”时ask sb about sth询问某人关于某事3.意思是：央求，要求时ask for+help,请求帮助
ask sb to do sth是什么意思?
没有ask sb do sth, 只有ask sb to do sth, 表示请求某人做...(事情. )I have to ask David to wait in the vestibule我只好让大卫在前厅等著。
ask todo和ask sb to do?
ask to do 是错误表达，ask 的用法是：ask sb to do sth 或者变成被动语态是be asked to do sth. 也可以ask sb to sth. 例如： Couldn't you ask Juan to the party?你不能邀请Juan参加这个聚会吗？摘自《柯林斯英汉双解大词典》(ask sb to sth. ) 或者：Couldn't you ask Juan to take part in the party? （ask sb. to do sth.） Couldn't Juan be asked to take part in the party? (be asked to do sth.)