虚拟语气主句中should能用于第三人称吗?--Do you think he would have given you a hand in your time of financial difficulty?--He_____if he had known about it. We are very good friends.选项中只有should have最接近呢, 但是我怎么

虚拟语气主句中should能用于第三人称吗?--Do you think he would have given you a hand in your time of financial difficulty?--He_____if he had known about it. We are very good friends.选项中只有should have最接近呢, 但是我怎么 关于虚拟语气中的从句~在虚拟语气中,与将来事实相反主句用would/could/should/might do从句用were to 或should do .从句should do中的should能换成would/could/might吗? 关于虚拟语气在虚拟语气的主句中,would/could/should/might这几个情态动词可以互换吗? 虚拟语气中从句情态动词用什么,主句一定用should 虚拟语气中主句中的助动词would could should might 怎么选 关于虚拟语气中should用法的问题,那天我查看if引导的虚拟语气的语法内容.说在主句中的should只用于第一人称,would可以用于各种人称.可是例句中又有if he should come,i would tell him.he 是第二人称啊 if用于虚拟语气,主句用would,could,should,might+动词原形,这4个词可以互换吗?请区别性的造句 虚拟语气中should是否可以省略 英语：should have done是否用于虚拟语气? 虚拟语气用于宾语从句是不是所有宾语从句中的虚拟语气都要省略should? 哪些动词在主句中,从句要用虚拟语气? 在虚拟语气中,怎样分辨条件从句和主句? 虚拟语气中过去的过去,主句如何表示? 虚拟语气中could,might,should,would的用法,有何区别?什么时候能替代 otherwise用于虚拟语气中求该词在虚拟语气中的用法及其例句 在虚拟语气中,是在虚拟语气中.if从句和should. 问一点虚拟语气的问题~虚拟语气中should和would有什么区别啊~ ought to have done和should have done都是虚拟语气,只是前者只能用在单个的句子当中,而后者可用于带条件状语从句的主句当中,