she was glad to make herself_____ A .understand B understood为什么要用过去时态?而make为什么不用过去式呀？

she was glad to make herself_____ A .understand B understood为什么要用过去时态?而make为什么不用过去式呀？
she was glad to make herself_____ A .understand B understood
为什么要用过去时态?
而make为什么不用过去式呀？

she was glad to make herself_____ A .understand B understood为什么要用过去时态?而make为什么不用过去式呀？
make oneself done 这本身是个固定搭配,意思的使某人怎么样．比如说让自己的话被听到：make oneself heard