问题描述： I have been studying English since I was five (对化线部分提问)前面有2个空 1个回答 分类：英语 2014-10-08 问题解答： 我来补答 I have been studying English since I was five你没有划线,我举了几个例子……1、when have you been studying English 2、what have you done since you were five what have I done since I was five 3、what have I/you been studying since I/you was/were five 展开全文阅读
