how long完成时how long不是问一段时间的吗?为什么可以用How long did you stay?

how long完成时how long不是问一段时间的吗?为什么可以用How long did you stay? How long did the meeting last?how long不是和完成时连用吗,为什么用did How long怎么回答 How long is it? how long 同义词是什么 用how long造句 'How long can I How long is your how long will be How long-this library-? 英语语法问题how long how long agoi really can't remenber_______A how long ago you met him B how long you have met him为什么不是B how long 是多久的意思为什么还要加 ago how long 不是引导完成时吗 how soon,how far ,how long区分 HOW far,How heavy,How much,How long,How often How Long Is Long Enough 歌词 以 How long 提问的句子是用现在完成时还是现在完成进行时 how long have you been doing that为什么用现在完成进行时 how long 问句 how long问句的答句用since加时间点或for加时间段能不能用in加时间段eg:--how long have you ...--i have ...in the two years.或者可不可以这样说,how long问句对用于现在完成时态how soon用于一般将 how long how soon how often how far 的区别.