英语虚拟语气问题it has been estimated that if the bridge were packed

英语语法1.it has been estimated that if the bridge were packed w 一个句子的语法It has been estamated that if the bridge were packed 虚拟语气:"If the bridge were packed with cars,it would…"请问were是不 新概念中的句子分析if the bridge were packed with cars 中用were是不是表虚拟,为何 虚拟语气选择题If it were not for the fact that you（）ill,I would ask 六级真题it has been estimated that theearth's surface temperatur 英语句式问题7.虚拟语气中if的省略.Were you in my position, you would do the 虚拟语气中的时态问题The house[ ] ready today but there has been a buli 虚拟语气if省略问题If I were invited, I would go to the party.这里的were 新概念英语3 17课.里面有句话.是这样的 it has been estimate that the bridge w He appeared as if he were sick.后面虚拟语气为什么用were而不是had been if it were not been可以虚拟过去吗