His wish was to become a scientist划分句子成分 谓语是 wish 还是 was 如何区分was后面为什么接不定式,不是一些时态的吗?如何理解

问题描述:

His wish was to become a scientist
划分句子成分
谓语是 wish 还是 was 如何区分
was后面为什么接不定式,不是一些时态的吗?如何理解

谓语是was
wish在这里是名词性做主语.
was to become 是be to do形式表示“将”、“计划”、“想要”.