早教吧 育儿知识 作业答案 考试题库 百科 知识分享

was+doing和wasbeendoing有什么不一样?d我发觉自己快被语法搞疯了buticouldn'tspeak,verysad....

题目详情
was+doing 和was been doing 有什么不一样?d
我发觉自己快被语法搞疯了 but i couldn't speak,very sad....
▼优质解答
答案和解析
没有was been doing这说,应该是 has/have/had been doing,has/have been doing是现在完成时,had been doing是过去完成时.
was doing 是过去进行.