since/自從，自…以來

since/自從，自…以來

1) since + 一個過去的具體的時間點(年、月、日、時刻: AP.112, last
    month, eight[o'clock])
   ex: Rules have been here since yesterday.
         從昨天開始，這裡就有了規定。

2) since + 從句　
   ex: Rules have been there since I was born.　
         從我出生起，法則就在那裡。
   ex: Great changes have taken place since rules disappeared.
         自從沒了規矩，這地方就有了很大的轉變。

3) It is （has been） + 一段時間 + since ＋ 從句
   ex: It is over 10000000 years at least since those monkey rules our banana.
         這些猴子管理我們的香蕉至少超過10000000年。