英语四级语法是提分利器，系统学习方能从容应考。新东方在线整理了“2026年12月英语四级核心高阶语法：状语从句之条件状语”，助力同学们高效备考！
2026年12月英语四级核心高阶语法：状语从句之条件状语
7. 条件状语从句：
(1)连接词：if, once, as long as, on condition that
① 如果引导的条件可以实现，主将从现;
② 如果引导的条件和事实相反，则用虚拟语气;
eg：If winter comes can spring be far behind.
As long as it doesn't rain, we can play.
You can go out on condition that you wear an overcoat.
Modern cars are far tougher to steal, as their engine management computer won't allow them to start unless they receive a unique ID code beamed out by the ignition (点火) key.
以上就是新东方在线英语四级语法频道给大家整理的“2026年12月英语四级核心高阶语法：状语从句之条件状语”相关内容，希望可以给大家备考带来帮助！