Mr.smith collected stamps 8 years ago用过去进行时改写

Mr.smith collected stamps 8 years ago用过去进行时改写
Mr.smith collected stamps 8 years ago用过去进行时改写

Mr.smith collected stamps 8 years ago用过去进行时改写
Mr smith was collecting stamps at the time 8 years ago

Mr Smith was collecting stamps 8 years ago