they would not have been prosecuted if they had not lied to police.请帮忙分析词句的语法结构
问题描述：
they would not have been prosecuted if they had not lied to police.请帮忙分析词句的语法结构
答
虚拟语气，表示本应该had not lied to police而他没有这样做
答
你好。这是表达过去事情的“虚拟语气”，如果改写成非“虚拟语气”结构就是：
they were prosecuted because they had lied to the police.
表达过去事情的“虚拟语气”的结构：
if + 过去完成时，过去将来完成时
（从句） （主句）
答
they would not have been prosecuted if they had not lied to police.
虚拟语气
从句 if they had not lied to police是对过去事实的虚拟,用过去完成时代替一般过去时.
译为：如果他们没有对警察撒谎
主句 they would not have been prosecuted 用would+have+done形式
译为：他们就不会被起诉了