英语语法.1·we would have won if we had had thousands of fans scr

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/05/19 17:44:29

英语语法.
1·we would have won if we had had thousands of fans screaming.请帮忙分析一下句子用的是什么时态,为什么有两个had?还有would have won 是would have done
2·I realized that i forgot to lock the classroom due to carelessness.请问不用在forgot 前面加个什么·have吗?（用完成时什么的?

1 虚拟语态
用if条件从句表示的虚拟条件,是虚拟条件最普通的方式.
　　① 虚拟现在时表示与现在事实相反的假设,其if 从句的谓语形式用动词的过去式(be 一般用were),主句用would/ should/ could/ might +动词原形,例如：If I were in your position I would marry her.
　　② 虚拟过去时是表示与过去事实相反的假设,if 从句的谓语形式用过去完成时即had＋过去分词,主句用would / should / could / might + have +过去分词,例如：If it had not rained so hard yesterday we could have played tennis.
　　③ 大多数的虚拟条件句属于上面三种情况的一种,但并不排除存在条件和后果中,一个和现在情况相反,另一个和过去情况相反,例如：If you had followed what the doctor said,you would not been so painful now.这个句子在高中出现频率颇高.
本例是第二种情况 if 从句的谓语用HAD加过去分词这是第一个had 二第二个had是原句中的动词“有”（我们有上千粉丝尖叫）把它改成过去分词就出现了第二个had
准确来讲would have won不是would have done句型而是if虚拟第二种情况的固定形式不过意思是差不多的都是本可以...而没有
2 我意识到我忘了.这里用简单的过去时就可以表示不突出“意识到”和“忘了”之前的先后关系可能二者时间相差也不多可能仅仅是不突出而已；如果非要突出先后关系或是时间差很大想用完成时也应是加had 用过去完成时

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