虚拟语气主句可用 Sb could do sth 虚拟语气主句可用should ,would 还可用“ could ” 你这个,if i were a bird ,I could fly in the sky .请问这句可以吗?按照语法书上的是：I would fly .

虚拟语气主句可用 Sb could do sth 虚拟语气主句可用should ,would 还可用“ could ” 你这个,if i were a bird ,I could fly in the sky .请问这句可以吗?按照语法书上的是：I would fly . 关于虚拟语气与现在事实相反 主句是should would could might +do 那要是被动语态呢?还有与过去事实相反 主句又变成什么样? 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? 虚拟语气 ifif引导的虚拟语气,从句时态倒退一步吗?主句呢?在对过去进行虚拟时,是不是 if sb had done sth ,sb should have done sth?对现在的虚拟,是不是 if sb did sth,sb should do sth 对将来的虚拟是怎样的? 英语高手请进关于虚拟语气的问题有一种：从句对过去虚拟,主句对现在或将来虚拟的混合情况主句用would/could+do还有一种：从句对过去虚拟 主句用would/could/+have do这两种到底有何区别?有如下 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? 关于虚拟语气should would could 用法及区别我在网上看到了如下解释：在虚拟语气中,should,would,could,might的区别：主句中,一人称可用would,也可用should,没有意义区别.前者表“肯定、必然”的结果, 虚拟语气中主句中的助动词would could should might 怎么选 advise后也可用虚拟语气?The doctor advised he ________________(放弃）smoking.(give)答案是(should)give up.为什么不用advise sb to do? If they had studied hard, they could do it easily now 这个虚拟语气中这个虚拟语气中,虚拟语气是与过去事实相反,从句用had+过去分词,那么主句不是应该用should/would/could/might+have过去分词的吗? 为什么这 什么短语后要接虚拟语气有suggest sb（should）do..还有什么短语后要用虚拟语气? 虚拟语气,与过去事实相反 :从句 :had + 过去分词 主句 :would/ should/ could/ might + have + done虚拟语气,与过去事实相反 :从句 :had + 过去分词 ,主句 :would/ should/ could/ might + have + done,为什么有时会有wou suggest that sb. should do 其中 should 可省略,这是虚拟语气吗 虚拟语气中的should能不能用shouldn't?比如说“suggest that sb shouldn't do? 英语中的虚拟语气 Sb did/were 之后用什么时态再+would do 请问虚拟语气 表示与将来事实相反的情况在虚拟语气中,表示与现在事实相反,或者与将来事实相反都可以用这个结构IF +一般过去 主句:WOULD COULD MIGHT +DO 的形式,如果是对的,我要怎么去区别呢, request that should do sth 虚拟语气中的should能换成could吗? 虚拟语气would可不可以随意换成could