She said she might not see her son fur another two years.这里为什么不是may而是might?时代变化何解?

She said she might not see her son fur another two years.这里为什么不是may而是might?时代变化何解?

这是个宾语从句.宾语从句的主句的谓语动词应和从句的谓语动词保持时态的一致.
主句是一般过去时——“said”,从句也用过去时——“might”
She said she might not see her son fur another two years.
主句 宾语从句