请帮忙分析英语句子成分

Question

His first contact with piano was when he was ten years old句子成分分析

请英语大神帮我分析一下句子成分，

还有我分不清contact是动词还是名词，

Answer 1

这是一个主系表结构：
His first contact with piano(主语，contact是名词) was （系动词） when he was ten years old （表语）

Answer 2

His first contact with piano 是名词短语做句子的主语。这里contact肯定是名词，它在形容词性物主代词后面呢，first 也是修饰contact的，with piano是介词短短做contact的后置定语。 was是系动词做句子谓语， when he was ten years old.后面是由when 引导的宾语从句。其实你只要理解就好第一次接触认识（主语）是（谓语）什么时候（宾语)

Answer 3

学好从句之前学好句子的成分很重要。