问题描述： 以 How long 提问的句子是用现在完成时还是现在完成进行时 1个回答 分类：英语 2014-11-22 问题解答： 我来补答 都可以.关键是看你陈述句是用了什么时态.I have done my homework for 2 hours .（我已经做了2个小时的家庭作业）How long have you done your homework I have been doing my homework for 2 hours .（我这2个小时一直在做家庭作业）How long have you been doing your homework 展开全文阅读
