区别瞬间动词和延续性动词
瞬间动词：发生的时间短暂，不能和延续性 的时间词连用。 如：buy, close
延续性动词： 动作可以延续，或者就是一个 状态。如：be, keep, stay
我买这本书3年了。 I have had the book for 3 years. Mary的爷爷从2010年去世至今。 Mary’s grandpa has been dead since 2010
4. Mr. Smith has worked here _s_in_c_e__he came to China.
5. His grandpa has been dead _fo_r_ several years.
Think it over!Are they right?
我买这本书3年了。 I have bought the book for 3 years. X Mary的爷爷从2010年去世至今。 Mary’s grandpa has died since 2010 X
选用for、since填空
1. We haven’t seen each other f_o_r__ a long time. 2. His father has been in this factory _s_i_n_c_e10
years ago.
3. The film has been on _fo_r__ 10 minutes.
for 和since的用法
区分点时间和段时间
5：30 5 years 3 minutes 2002 May 5th 2 mo续了多久 I have been a teacher for 10 years.
since+过去的某个点时间，表示自从..时候起 I have been a teacher since 2010. I have been a teacher since he left Zhuzhou.
Translation
• 我借他的书有2个月了。
• 自从10年前，Tom 已经来了株洲。
• 他买这本书1年了。
• 从2010年起，他已经是个有名的歌手了。
转换
come/go – be (in /at) I have been in Zhuzhou for …. buy – have I have had the book for… borrow – keep I have kept the book for…. die – be dead He has been dead for… become – be I have been a teacher for… marry – be married They have been married for… open – be open The door have been open for….