请说说主谓宾The only way to do this was to operate.do 和was都是动词啊?

请说说主谓宾The only way to do this was to operate.
do 和was都是动词啊?

这是主系表结构,不是主谓宾结构
way是主语,only 和 to do this 都是way 的定语,形容词和不定式可以作定语
was 是系动词
to operate 是不定式作表语