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啥时用can,what,how long,how often,hou far,which,do,does. 疑问代词造句what time ' what color ' how often ' how long'how far' how long how soon how often how far 的区别. how old,how long,how soon,how often,how far ,how many,how mu 怎么分清how long/soon/often/far? How many,How long,How far,How often,How soon 分别什么提问? how often how long how far how many how much 的区别 七A英语怎么区别 how far 、how often、 how long 、how soon how far .how long .how soon .how often .这四个短语有什么区别呢? A.How often B.How far C.How long D.How soon的区别与用法 精解How far How long HOW soon How often的用法 How often How soon How long How far之间有什么区别?