if虚拟语气练习条件从句谓语主句谓语与现在事实相反did (be-were)would/could/should/might +do与将来事实可能相反1. did (be-were)2. should do3. were to do would/could/should/might +do与过去事实相反had donewould/could/should/might + have done虚拟的倒装：提前had，should，were 省略if错综虚拟条件句，主句，从句时间不一致含蓄虚拟语气，省略if 条件句1. If I _ you, I _ worry. A.were/ wouldnt B.was/ wouldnt C.been/ would have D.be/ would 2. _, I would take an umbrella with me. A. If I Had been you B. I were you C. If I were you
