做决定之前仔细考虑,一旦作了决定就要勇往直前、坚持到底以下就是学而思1对1小编为大家整理的高中三大从句-if引导的虚拟语气以及名词性从句中的虚拟语气。这是倪萍老师为大家精心准备的学习知识汇总。希望对大家可以有所帮助!
高中三大从句
定义:虚拟语气是谓语动词的一种特殊形式,用来表达假设、主观愿望、猜测、建议、可能或空想等非真实情况。
一、if引导的虚拟语气
(一)错综时间条件句:
当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时,被称为错综时间条件句,动词的形式要根据它表示的时间作出相应的调整。如:
If you had followed my advice just now,you would be better now。
If you had studied hard before,you would be a college student now。
(二)if省略句
在条件句中可以省略if,把were,had,should提到句首,变成倒装句式。如:
If I were at school again,I would study harder。
→Were I at school again,I would study harder。
如果我还有上学的机会,我会更加努力学习。
If you had come earlier,you would catch the bus。
→Had you come earlier,you would catch the bus。
如果你来得早点,你就能赶上公共汽车。
If it should rain tomorrow,we would not go climbing。
→Should it rain tomorrow,we would not go climbing。
如果明天下雨的话,我们就不能登山去了。
(三)用介词代替条件状语从句
常用的介词有with,without,but for。如:
What would you do with a million dollars
=if you had a million dollars
如果你有100万元,你会做什么?
We couldn’t have finished the work ahead of time without your help。
=if we hadn’t got your help。
没有你的帮助,我们不可能优先完成这项工作。
Without your help,we couldn’t have finished the work ahead of time。
=But for your help,…
=If it had not been for your help,…
=Had it not been for youhelp,…
没有你的帮助,我们不可能优先完成这项工作。