Question

Ahead of me I saw a woman ----------I thought to be was my aunt A.was B.who.

答案是A.请问:B可以吗？为什么？在这里，引导词可以省略吗？

Answer 1

who i thought was my aunt.正确
Whom I thought was my aunt 不可以
因为 I thought she was my aunt 原来的形式主义所以这里缺少的式主语 she 所以只能用who来代替 且放在本从句开头，修饰a woman。
或者把握i thought 看成插入语，不影响后面的句子结构力学who was my aunt.