This is the craziest thing I have heard so far.间接引语

问题描述:

This is the craziest thing I have heard so far.间接引语
“This is the craziest thing I have heard so far”(She thought).变成间接引语
不是说只变从句吗?为什么答案中从句里的定语从句也要变?变成I had heard?为什么?

have heard与This is时态一致;现在is变成was,have当然要相应地变成had.