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 为什么是it was It is five years since we began learning English It is five years since we began to enjoy a ten-day spring ho It is five years since we began to enjoy a ( )spring holiday It is five years since we began to enjoy a _________spring h It is five years since we began to enjoy a ___spring holidey it ( is )six years since he ( began )to learn english 解释两个句子It was five years since I lerned English.和It was five It is five years since he smoked It ___about three years since Dean began to learn English It ( ) seven years since he began to teach English here.