如何区分how often,how soon,how long这三个短语?
问题描述：
如何区分how often,how soon,how long这三个短语?
答
how often,对频率进行提问
how soon, ,多用于将来时
how long 对一段时间提问
答
how often,问频率
how soon,问时间多快
how long问需要多久
答
How often you have been abroad?No often,only twice.
你出国几次了？不多，只去了两次
His purpose was to discover how long these guests intended to stay
他想要知道这些客人打算呆多长时间
答
how soon 用于一般将来时的句子中，而how long是对时间段提问，用for+一段时间来回答
how often则是询问频率的
答
how often问的是事情发生的频率
how soon是问从某一点开始有多快
how long问的是时间段