She is the woman.I wrote a letter to her.改为定语从句变成定语从句是：She is the woman I wrote a letter to.可以改为：She is the woman to whom I wrote a letter.
问题描述：
She is the woman.I wrote a letter to her.改为定语从句
变成定语从句是：She is the woman I wrote a letter to.
可以改为：She is the woman to whom I wrote a letter.
答
可以的。
从你的句子可以看出，你的语法功底扎实，而且已经知道介词提前是常用的方法。相信自己就好了哦，呵呵。
记住一点，就可以自己判断了：整个从句，作为所修饰那个词（主句中）的定语。
这里， I wrote a letter to the woman. woman用whom指代（因为从句中做宾语）。可以看出整个从句是修饰说明主句中的woman。所以是它的定语从句啦。
答
可以的没有问题
答
She is the woman.I wrote a letter to her.改为定语从句She is the woman I wrote a letter to.=She is the woman to whom I wrote a letter可以将介词提前,形成【介词+关系词】的结构,相比之下,后一种更常用...