有用过去完成时的.
在since 引导的状语从句中,用一般过去时的时候较多,主句用过去完成时.例如：
I saw Zhang Na last week. We had not seen each other since we parted in Beijing. 上周我见到了张娜.从北京分手后我们就再没见过面.
since 引导的时间状语从句中有时也可以用过去完成时.例如：
The girl had changed greatly since we had met each other last time. 从我们上次见面以来这个女孩改变了很多.