请问这句话的语法分析,虚拟语气与倒装The Achievements of the greatest minds in science could never have been reached had it not been for the patient work for hundreds of others.1.请问句中为什么要用could?这是什么语法结

请问这句话的语法分析,虚拟语气与倒装The Achievements of the greatest minds in science could never have been reached had it not been for the patient work for hundreds of others.1.请问句中为什么要用could?这是什么语法结 if引导虚拟语气,省略if,句子会发生倒装,请问下面这句话怎么倒装?If we had time,we could play the game again. suggest 虚拟语气 的倒装句 求此句英语语法分析The original result becomes questionable should no improvement be observed.shoud这是倒装吗?这种倒装不是要用在虚拟语气吗?如果这句是虚拟语气,为何前面的主句部分不加would呢?如果这句 英语语法分析,虚拟语气The millions of calculations involved,had they been done by hand,all practical value would have lost by the time they were finished.为什么这句话是虚拟语气,为什么had they been done by hand 要倒装 这句话是不是要用虚拟语气?请问,“如果你会说中文就好了”这句话如何正确翻译?是不是翻译的时候要用虚拟语气? 关于IF虚拟语气以及IF虚拟语气的倒装（在线等）如果我们有自信,我们将能战胜一切困难.”这句话这样写对吗?If we were confident,we might conquer all the hardship. 还有,是否需要虚拟语气倒装?如：We 从句,虚拟语气,倒装是怎么回事 虚拟语气什么时候用倒装? i cant say with any certainty when i shall be back next week.这句话是不是虚拟语气?这是虚拟语气加上倒装吗? 英语中虚拟语气省略并倒装的情况 你会正确使用虚拟语气的倒装形式吗 虚拟语气中if 的省略 Ifit rained tomorrow morning ,you would do ,.这句话怎么变成省略if的倒装句?虚拟语气中if 的省略Ifit rained tomorrow morning ,you would do what.这句话怎么变成省略if的倒装句,难道是rained it 关于should提前倒装.should you ask successful students around you,you will discover more tips.这句话should提前倒装是表强调么?还是虚拟语气? 什么是虚拟语气,怎么判断这句话是不是虚拟? 英语虚拟语气倒装问题!were,had,should这三个用于倒装时有什么区别啊? 请问英语虚拟语气的用法 虚拟语气倒装句是什么?球例句~