IfIweretobeafatherof...,Iwoulddie.wereto作什么成分?请分析哪是主,系,IfIweretobeafatherof...中were是助动词，be是系动词，afatherof...是表语IfI主语were系动词tobeafatherof...,表语条件状

Question

If I were to be a father of...,I would die.were to 作什么成分?请分析哪是主,系,
If I were to be a father of...中 were是助动词，be是系动词，a father of...是表语
【If I 主语were系动词 to be a father of...,表语】条件状语从句【I主语 would die谓语】主句.
哪个对呢？

Answer 1

be to do sth中be为助动词.
be to do sth,可表示下列内容：
①表示计划、安排或相约、商定.这种用法也可以说成是一种将来时态表达法.
There is to be a meeting this afternoon.
We are to meet at the school gate at seven tomorrow morning.
②表示命令.“应该、必须”
You are to explain this.　对此你要做出解释.
He is to come to the office this afternoon.　要他今天下午来办公室.
你说的句子为虚拟条件句,是对将来的虚拟假设,谓语有一种形式使用were to do sth,如：
If you were to come tomorrow,I might have time to see you.你如果明天来的话,我或许会有时间见你.
If I were to be a father of...中 were是助动词,be是系动词,a father of...是表语.