6、员的状态可持续)•11、for和since的运用for表“经历(一段时间)”,而since表“自从…… 以来”。•例如:•1.He has stayed here for 3 hours.•2.He has stayed here since 3 hours ago.3.He has stayed here since 3 o’clock.•4.He has taught English since he came here.12、Fillintheblankswith“for”or“since