2017-2108学年 牛津版 选修六 Unit 1 Unit 2 What is happiness to you-Grammar课件(35张PPT)
2017-2108学年 牛津版 选修六 Unit 1 Unit 2 What is happiness to you-Grammar课件(35张PPT)第3页

注意: 1)一般过去时所表示的动作或状态都已 成为过去,现已不复存在。 He lived in Shanghai for 20 years but now he lives in Beijing. (现已不在上海了) He has lived in Shanghai for 2 years. (还在上海)