since when ,how long 区别

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sincewhen,howlong区别sincewhen,howlong区别sincewhen,howlong区别sincewhen表示自从……是从一个时间点开始而howlong表示多久,代表一段时间

since when ,how long 区别
since when ,how long 区别

since when ,how long 区别
since when 表示自从……是从一个时间点开始
而how long 表示多久,代表一段时间,是一个时间段

since when ,how long 区别 是不是when.现在完成时.since.how long 现在完成时 .for. 英语短语疑问词有哪些?标下中文比如how long?how long ago?Since when?等 How long is it_____ I _____?A.since…arrivedB.since…has arrivedC.when…arrivedD.as…arrived ---Mark broke his leg when he was playing football.---_____was that?A.since when B.since when ago C.how long ago C. -()have you lived in shanghai?-Since we ()work here.A.When;have found B.How long;found C.When;have found D.How long;have found _____has she been your English teacher?Since she ______ to China.A How long ...comesB When...comesC When...has comeD How long...came ----Tom told me once he had a fall and broke his arm.---- _____was that? A Since when B How long ago C For when D For how long 大家帮忙解答下这道英语选择题应该选什么?-Mark broken his leg when he was playing football.-_____ was that.A.Since when B.Since when ago C.How long D.How long ago 麻烦大家详细分析下 how long is it ___the class ___?A when .. begins B when .. began C since.. had begun D since .. began选择D 是为什么么呢 How long is it ____ the metting___?A.When,began B.since,began C.when,begins D.since,has been begin 不是瞬间动词嘛 不是不能和how long连用的嘛?为什么不选D how long has the bookstore been in business ——2000 A when B after C since D before How long do you think it will be ______ the economy revives?A.after B.since C.before D.when ------____ have you been painting?------Since three years agoA.When B.How long C.How ofen D.How soon应该选什么啊? --- How long have you been collecting coins?--- ________.A.Since 5 years ago B.Since 5 years C.C.In 5 years D.When I was 5 I have had a computer since I went there 如果把since 和其后画上线是用when还是how long提问? 回答下列括号中的( )have you been at this factory?I have been here since 19993.A.When B.How long C.how often D.What time a —— (______ )have you lived there?Since 1970 A.how soon B.how often C .how long D.when Work ha—— (______ )have you lived there?Since 1970A.how soon B.how often C .how long D.whenWork hard ,_____you will catch up with others.A.or B.