英语动词问题:MY exercise plan is (built) on a daily basic.

问题描述:

英语动词问题:MY exercise plan is (built) on a daily basic.
这里为什么用build的过去式形式?明明前面是系动词 is

这个不是被动语态吗?
built不是过去式,而是be+过去分词
build built built
过去式 过去分词