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基本释义
  • ad. 自那时以后
    prep. 自…以后,自…以来
    conj. 既然,自…以后,自…以来
参考例句
    1. It is just a year since I saw him.
      我上次遇见他到现在正好一年。
    2. I have been awake since midnight .
      我从半夜就醒了。
    3. It has been a flourishing place here since ancient times.
      这个地方自古就是个繁华之地。
    4. She has altered a great deal since I saw her last year.
      她和我去年见到时已改变很多。
    5. The boys have been comrades since kindergarten days.
      这些孩子从幼儿园时就成了好朋友。‘