一道英语改错题,帮帮忙,O(∩_∩)O谢谢!They didn't have finished it by last Sunday.为什么didn't have要改成hadn't?

一道英语改错题,帮帮忙,O(∩_∩)O谢谢!They didn't have finished it by last Sunday.为什么didn't have要改成hadn't? 一道计算题,帮帮忙哦!O(∩_∩)O 英语题,帮帮忙❤反身代词?O(∩_∩)O谢谢! 英语寒假生活上的一题还有一道，O(∩_∩)O谢谢 用is there anything about...做英语对话?大家帮帮忙,O(∩_∩)O谢谢! 电话那头英语怎么说? the phone吗?帮帮忙谢谢O(∩_∩)O~ dresser是什么意思急!帮帮忙!O(∩_∩)O谢谢 英语阅读题,求解答O(∩_∩)O 一道英语题O(∩_∩)O谢谢eyes are the window of heart为什么不是windowsO(∩_∩)O谢谢 生物题O(∩_∩)O 煤、煤炭、煤矿是不是一回事啊?O(∩_∩)O谢谢!帮帮忙!O(∩_∩)O谢谢啦! .o(∩_∩)o... o(∩_∩)o... o(∩_∩)o O(∩_∩)O 急需30字英语日记!望各位帅哥美女帮帮忙!谢谢了!O(∩_∩)O~ My school is three miles far from my home.如题改错o(∩_∩)o... 音乐会 用英语怎么说?O(∩_∩)O谢谢