how long做疑问词时 问句后什么时候要加for 什么时候不用加比如说I have lived here for ten years.对for ten years进行提问How long have you lived here?和How long have you lived here for?有什么区别么另一例句 How long

how long做疑问词时 问句后什么时候要加for 什么时候不用加比如说I have lived here for ten years.对for ten years进行提问How long have you lived here?和How long have you lived here for?有什么区别么另一例句 How long
how long做疑问词时 问句后什么时候要加for 什么时候不用加
比如说I have lived here for ten years.对for ten years进行提问
How long have you lived here?和How long have you lived here for?有什么区别么
另一例句 How long do you want it for?答语是For three weeks.可以改成how long do you want it?么

how long做疑问词时 问句后什么时候要加for 什么时候不用加比如说I have lived here for ten years.对for ten years进行提问How long have you lived here?和How long have you lived here for?有什么区别么另一例句 How long
一般都说How long have you lived here?没有后面这种说法.因为live本身就是延续性动词,for用在这里是多余的.
How long do you want it for?
这里不能省略for,want是非延续性动词,所以要带上for.
也就是我们可以说 I have lived here for ten years.但不能说I have wanted it for ...,所以前者对时间提问可以不用for,后者要加上for,这种用法可以凭语感.

你从哪整的例句啊？how long do you want it for? 这是啥句子呀