(六)过去进行时 过去进行时表示在过去某个时候正在进行的动作或过去某个阶段正在做的事情. 例如: 1) He was reading an interesting book this time yesterday. 2) When I came in, they were having supper. 查看更多

 

题目列表(包括答案和解析)


同步练习册答案