定语从句的时态问题,eg:比如主句是一般过去式 从句一定要什么时态啊?全部举例 有没有限制?

主句是一般过去式，从句 一般 用过去完成时，例如I told mother that i had finished my homework.我完成作业发生在告诉妈妈之前，所以过去的过去应该用过去完成时；不过也有特殊的情况，例如Teacher told me that the moon goes around the earth when i was a pupil.当我还是个小学生的时候，老师就告诉过我月亮绕着地球转。月亮绕着地球转是客观的科学事实，所以用了一般现在时态而不受主句的影响。同理，主句的一般现在时态也是这个道理了。

定语从句并没有固定的时态规律.主从句时态都要根据具体情况而定.
eg.I will eat the food you bought yesterday.主将从过去
I bought the same book this morning as you bought yesterday.主过去,从过去.
I liked the way you spoke English,主从都是一般过去时.
I have finished all the work that you asked me to do.主句现在完成,从句一般过去.
I finished all the work that you had asked me to do.主句一般过去,从句过去完成.
没有规律,没有限制.主从句各自的时间状语对应各自的时态.
希望能帮倒你.