怎么做直接引语改间接引语

he said that I had left my book in his room

需要注意的是：
1.直接引语里的引语的时态要变成跟主语一致的事态
2.引语人称代词看情况也改变

1. He said to me that he has left his book in my room.

改起来先要确定把第一人称第三人称什么的搞清楚。

He said to me that he had left his book in my room.

He said to me that he had left his book
in my room.

He told me he had left his book in my room.