Question

I bought a pen tow hours ago. 改成 I ___ ____ a pen for ____ ____ .

Answer 1

I have had a pen for two hours.buy是短暂动词，若用完成时态则应用持续动词，所以将buy换成have.

Answer 2

I have had a pen for two hours

Answer 3

have bought two hours

Answer 4

I had bought a pen for two- hour ago.