we've been friends_____we came this school a year agoA when B for C before D since选哪个才对呢?为什么BEFORE 不对呢?
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![we've been friends_____we came this school a year agoA when B for C before D since选哪个才对呢?为什么BEFORE 不对呢?](/uploads/image/z/11999980-28-0.jpg?t=we%27ve+been+friends_____we+came+this+school+a+year+agoA+when+B+for+C+before+D+since%E9%80%89%E5%93%AA%E4%B8%AA%E6%89%8D%E5%AF%B9%E5%91%A2%3F%E4%B8%BA%E4%BB%80%E4%B9%88BEFORE+%E4%B8%8D%E5%AF%B9%E5%91%A2%EF%BC%9F)
we've been friends_____we came this school a year agoA when B for C before D since选哪个才对呢?为什么BEFORE 不对呢?
we've been friends_____we came this school a year ago
A when B for C before D since
选哪个才对呢?
为什么BEFORE 不对呢?
we've been friends_____we came this school a year agoA when B for C before D since选哪个才对呢?为什么BEFORE 不对呢?
D since
一年前我们来到这所学校,就成了朋友.
不用before的原因:have been强调一年前我们来到这所学校这个时间段,如果用before意思就成了我们来学校之前就已经是朋友,have been应该改成过去式were.
D since 自从
since自从
意思为自从一年前我们进入这所学校时就成为了朋友
D
d
D
D