英语中直接引语变间接引语的时态怎么变?

先给你个例子 ：She says：“she is a student”。有直接引语变为间接引语→She said that she was a student.
时态变为一般过去时，如果直接引语是一个客观真理时，则直接引语变为间接引语时时态为一般现在时，例如：My teacher says：“The earth goes around the sun”。变为间接引语为：My teacher said that the earth goes around the sun。
不知道你听懂没，我可是很详细人真的给你讲解了，不懂的可以追问哦~~~

1.若直接引语的动词为一般现在时，间接引语的动词时态与主陈述句一致。
例：He said, "I'm hungry."---> He said he was hungry.
He says,"I will go."--> He says he will go.
2. 若直接引语的动词为过去时，间接引语的动词为一般完成时。
例；He said,"I was hungry."-->He sald he has been hungry.
3.若直接引语的动词为一般完成时，间接引语的动词为过去完成时。
例：He says,"I've been to China twice."--> He says he had been to China twice.

往过去推！