Question

The young girl dressed in red is my daugher.

The young girl dressed in red is my daugher.

为什么用dressed，而不用dressing?

谢谢～

Answer 1

The young girl dressed in red is my daugher.

为什么用dressed，而不用dressing?

因为dress在这个时候，后面要加宾语，正常的用法是：
dress sb 给某人穿衣服。如果其后没有sb，也就是宾语，那dress就要用dressed，这一点一定要记住。
这句话可以这样理解：　the young girl (who was) dressed in red is my daughter.
同样的用法还有：seat,它当定语时，后面没有宾语时，也要用seated.
The man seated /sitting under the tree is his uncle.

Answer 2

dressed=who dressed.这里的dressed做定语从句可省略who.
用dressed表明这个是以经完成的动作，我们看见的是已经穿着好了的小女孩儿而不是正在穿的动作

Answer 3

已经穿上咯，不是正在穿的过程

Answer 4

dressed=who is dressed