_______my childhood,I wonder how I ever had so much fun.答案为Looking back on,为什么不能填Look back on 要填Looking?这不是俩个句子吗?
这是分次做状语形式,必须用doing、done、having done之类的,
如果想用look的话,那必须要加一个and也就是
Look back on my childhood, and I wonder how I ever had so much fun.
这个语法还蛮深的,如果你现在已经是高中或以上了,就务必要弄清楚,否则的话,初中是不要求的.你要还有想法,我随时等你
再问： 我现在是高一，能详细讲下吗，谢谢了，在线等
再答： 恩，好的 专业上的说法是分词作状语 有几种情况 1.Doing + 句子 比如Looking back on my childhood, I wonder how I ever had so much fun. 后面句子主语是 I 对吧，所以肯定是我回顾咯，用doing 2.Done + 句子 比如Seen from the top of the mountain, our city is really beautiful! 这里主语是our city ,肯定是被看咯，于是用done的形式 切忌：没有being done + 句子 的形式 3.Having done / having been done + 句子 Having had lunch ，he still ate a bowl of noodles then. 也就是说，having done的形式通常有明确时间先后顺序 为了做题方便，你可以尝试用after来替换，比如例句 After he had lunch ，he still ate a bowl of noodles then. 大致形式就是这三类了，有不懂再问哦
