分类：教育/科学-外语学习
问题：虚拟语气ifi___harderatschool,iwouldb 
if i ___harder at school,i would be sting in a comfortable office now A worded B were to worked C had worked 选哪个 为什么 谢谢 
回答：这个题目属于虚拟语气中的非真实条件句，它的时态可以表示过去，现在和将来的情况。它的基本特点是时态退后。a.　 同现在事实相反的假设。句型 ： 条件从句　　　　　主句　　　　一般过去时　　　should( would) +动词原形　 If they were here, they would help you.如果他们在这里，他们就可以帮助你（事实上他们不在，所以没法帮助你）b.　 表示于过去事实相反的假设。句型： 条件从句　　　　　 主句　　　　　　　　过去完成时　　　 should(would) have+ 过去分词　 If she had word harder, she would have succeeded.　   如果她工作很努力，她就会取得成功（事实上她由于没有努力工作所以没有成功）if i ___harder at school,i would be sitting in a comfortable office nowA worded B were to worked C had worked 属于第二种情况，与过去事实相反，所以从句用过去完成时，因此 答案是 C