分类：教育/科学-外语学习-英语考试
问题：这道题错在哪里，请改正。Ithoughthehadfinishe 
I thought he had finish his homework at this time.
回答：其实at that time和by that time都对
前者可理解为thought的时间
后者是had finished的时间
总之关键在于this应该是that才对