这句话有错吗（英语）When have you finished your homework?是不是不能用完成时要用一般过去时啊?为什么呢?

这句话有错吗（英语）When have you finished your homework?是不是不能用完成时要用一般过去时啊?为什么呢? “when we meet with difficulty”这句话有错吗? 英语句子改错：But we have some hobbyBut we have some hobby这句话有错吗,有错请帮忙改一下并说说理由, “does he want have a pary ”这句话有错吗 i have been there for twice 这句话有错吗 i have a bad habit.这句话有错吗 I wanna have a guitar.这句话有错吗?RT. 这句话有错吗 这句话有错吗? Call me when you have time 这句话有错吗?Call me when you have time 这句话有错吗?不是说动词不能做主语的 为什么Call在第一个呢?这么说对吗?Calling me when you have time Do you know （the boys each have）an apple这句话有错吗? 简单英语一道题这句话有错吗.什么意思 这句话有错吗 because they both have experience.句中have是否要改成had I feel very happy when we together.这句话有错吗? When you go out,there are various means of transport to choose.有错吗这句话 when we arrived at airport the plane has fly.这句话语法有错吗? when i arrived california four months ago这句话有错吗?错在哪?急用! the days when we got together这句话有错没?