“what‘s wrong with you”,he said.转换间接引语

He asked what was wrong with me.
因为主句用了过去式,而后面描述的句子不属真理性的,所以is要相应改成was
She said (that) she could swim.
理由同上,只有当从句描述的内容属真理性时,才不需改时态,例如：
Our teacher told us the earth goes round the sun.