来自汪德宗的问题
用适当单词的动词形式填空.I_____(write)toyoubeforeI__用适当单词的动词形式填空.I_____(write)toyoubeforeI_____(come)back.
用适当单词的动词形式填空.I_____(write)toyoubeforeI__
用适当单词的动词形式填空.
I_____(write)toyoubeforeI_____(come)back.


用适当单词的动词形式填空.I_____(write)toyoubeforeI__用适当单词的动词形式填空.I_____(write)toyoubeforeI_____(come)back.
用适当单词的动词形式填空.I_____(write)toyoubeforeI__
用适当单词的动词形式填空.
I_____(write)toyoubeforeI_____(come)back.
IhadwrittentoyoubeforeIcameback.
讲过去的过去的事情,用过去完成时.