【点关注不迷路】如果我的内容对您有一点点帮助，欢迎关注、评论、转发，我会继续努力哒今天是第28句100 computers have been given to us by a local computer company since the end of last year.
3⃣️用法:1)过去的经历，如:I have lived in SangHai;3)持续的状态，常用for/since， for 接一段时间，since 接时间点，如:I have been here for 20 minutes. I have been here since 9 o'clock.
