分类：教育/科学-外语学习
问题：英文问题makeaphonecalltohimrapidly,o 
ma a phone call to him rapidly, otherwise he would go there in vain.if i knew ,i would have told you.这两句其中的 would 从语法角度上，都是什么情况。
回答：1.Make a phone call to him rapidly, otherwise he would go there in vain. 
2.If I knew ,I would have told you. 

这两句中的would都是用于语法项目【虚拟语气】结构的。
第一句中，otherwise引出“含蓄条件句”，表示与现在事实相反的虚拟语气；
第二句里，借助于if从句表达“与过去事实相反的虚拟语气”，只是有点小问题：if从句中最好用成：If I had known,I would have told you.这样才更好理解，也搭配得更好。