2019学年度人教版选修八Unit 5Meeting your ancestors Period3Learning about Language课件(36张)
2019学年度人教版选修八Unit 5Meeting your ancestors Period3Learning about Language课件(36张)第3页

 I have been collecting shells for five years. 五年来我一直收集贝壳。

I started to collect shells five years ago. 我五年前开始收集贝壳。

Leading-in

现在完成进行时

一般过去时