how long 与how ofter的区别他们两个都有多就的意思

how long 与how ofter的区别他们两个都有多就的意思
how long 与how ofter的区别
他们两个都有多就的意思

how long 与how ofter的区别他们两个都有多就的意思
辨析how soon,how often与how long
一、how soon表示“要过多久以后,要到什么时候”的意思.用来对句中带有in no time,immediately,before long,（very）soon,in five days（weeks,months,years,etc．）,after Monday（January,1949 etc．）提问.如：
He’ll come back in two hours.→How soon will he come back?
二、how often表示“多长时间一次,是否经常”的意义,通常用来对sometimes,usually,never,seldom,often,always,every day,every two weeks等表示频度的副词或词组提问.如：
He writes to his mother once a month．→How often does he write to his mother?
三、how long表示“多长时间”的意义,用来对句中带有for,unit（till）,since,all the morning,from…to…等表示一段时间的状语提问.对某些动词（take,spend等）后面表示时段的名词提问时也用how long.如：
Mr.Black has lived in Shanghai for over two years．
→How long has Mr.Black lived in Shanghai?

how long`用于询问持续时间的长度
how often用于询问频率的多少，多久做一次

how long 对时间长度进行提问 比如问：你去健身房通常锻炼多长时间？
how often 对频率进行提问 比如问：你多久去一次健身房？

how long 对多长时间提问
how often对频率提问,频率的词有:seldom always sometimes every usually often……