For 和since 在现在完成时中的用法区别时间点和时间段 5:30 5 years 3 minutes 2002 May 5 2 months时间点时间段时间段时间点时间点时间段since:( 自以来)1)since+ 过去的时间点Hehasstayedheresince5oclockyesterday.2)since+ 时间段+agoHehasstayedheresince5hoursago.3)since+ 从句（动词用过去时）ShehastaughtEnglishsincehecamehere. for:( 长 达）for+ 时间段Hehaskeptthebookfor2weeks.since,for 的用法: Takenotes 选用 for 和 since 填空:1.We havent seen each other _ a long time.2.His father has been in the Party _ 10 years ago.3.The film has been on _ 20 minutes.4.Mr Green has worked here _
