问题描述: I have studied English or three years since I had come here.(改错) 1个回答 分类:英语 2014-09-22 问题解答: 我来补答 I have studied English for three years since I (had come)(把这两个词改为came) here.自从我来到这里,我已经学了三年英语了.主句为现在完成时态,since引导的时间状语从句应该为一般过去时,had come应该改为came. 展开全文阅读