had been 用法.
had been 用法.
had been 的意思和用法?
has been 和 had been 的用法和差别
英语中had 和 had been 的用法?
have has had或 having +been 的区别和用法
请问HAS BEEN和 HAVE BEEN HAD BEEN的用法以及分别加DONE后的用法
Had had的用法.
what had been done had been done.
have been 与had been
have been doing 和have done 还有had done三者的区别,用法
介词+句子的用法?Considering Jane had only been there before,she did
had been doing