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。