英语中虚拟语气的条件句中如有should / were/had 【过去完成】,可将if 省略,把should/were/had提到句首,构成部分倒装.
Should it rain tomorrow,we would not play basketball.如果明天下雨,我们就不会去打篮球了.=If it should rain tomorrow,we would not play basketball.
Had I prepared well,I couldn't have lost the job.如果我准备充分了,就不会失去这份工作了 =If I had prepared well,I couldn't have lost the job.Were I you,I would try it again.
=If I were you,I would try it again.我是你的话,就再试一次.