it is five years since we began learing English 为什么不是it was

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it is five years since we began learing English 为什么不是it was
it is five years since we began learing English 为什么不是it was

it is five years since we began learing English 为什么不是it was
固定的一种结构:it is+ 一段时间 since +句子
翻译:距离.已经有.时间
since的用法比较特殊,一般主从句之间要前后照应,比如说:He said he went to Shanghai yesterday.但since不同,它的前后是不一样的,所以做题可以据此来选择.

其实这个地方用两个都是对的,只是用Is更好,因为它是现在的陈述。