条件状语从句缩略的原则 是什么？？

哦，你说的是if条件句的缩略吧？那就要看从句后面的谓语动词是什么了。
<br>eg. If I were you, I would go to the cinema.
<br>省略后：Were I you, I would go to the cinema.
<br>If I had gone to school, I would have passed the exam.
<br>省略后：Had I gone to school, I would have passed the exam.
<br>注意：省略了的从句中，主句要到装。
祝你成功啊！