have been 的用法_百度文庫 - 百度文庫——讓每個人平等地提升自我

have been 的用法 隱藏>> Have been (ing) Brian has been mending the clock all morning. I have been writing to David since 1969. I have not been doing anything lately. She has been trying to call Jill for the last hour. We have not been going to the movies My ..

wenku.baidu.com