英语：it was＋段时间＋before结构是什么意思?

英语：it was＋段时间＋before结构是什么意思? 有没有it is been+段时间+since和it was be+段时间+before这种表达? It is/was +段时间 +连词（since/before）+一般现在时,一般过去It is/was +段时间 +连词（since/before）+一般现在时,一般过去时,或完成时.请哪位懂的讲一下,关于连词的固定句型 it was 时间when it was 时间before it was 时间since 这几个句型有什么区别 it won't be very long before .句型用法 it will be +段时间+before .句型用法 It is +段时间＋since+主语＋did.请比较：It was +段时间＋since+主语＋had done.如：It is five years since he left here.他已经离开这儿五年了.It was five years since he left here.（同上） 请问第二句不是应该用it 英语时间状语从句1,“走之前把门关上”是不是应该时间状语用when引导,为什么不用before,若用before怎么翻译.2,The fire went on for quite some time _________ it was brought under control.为什么填before而不能填w It was a novel before it was a movie翻译! 英语翻译:不久我们就适应新的学校生活了(用it will be+段时间+before) What day ______ it the day before yesterday?A.is B.was一道英语选择题,帮下忙, 英语短文 It was two months before Christmas Day.Little Almie Rose said~~~>..翻译短文翻译 英语翻译Our village __________________________what it was before. It was the day before Christmas翻译? It was three years before he came whet shape was it before?是什么意思 请问这句英语中的从句后为什么还要有一个before?It seemed as though this was the first time it had ever seen human beings before. 高三英语复习题2Did jack come back early llast night?yes,it was not yet eight o'clock_____he arrived home.A before B when C that D until正确答案是B.为什么是B?A错在哪里?不是说IT be +时间点+ before表示在××××× 之前, It is+段时间+since sb did.这是翻译成 自从不做.多久了 那么自从做.多久了 应怎么翻译It is not+段时间 before sb did 怎么翻译