雅思语法在条件状语从句的虚拟语气是怎样的

雅思语法|在条件状语从句的虚拟语气是怎样的？，很多同学对于这个问题有疑问和不解，那么下面就跟着中国教育在线的小编详细了解一下吧。

1. 用if条件从句表示的虚拟条件，是虚拟条件最普通的方式。

① 虚拟现在时表示与现在事实相反的假设，其if 从句的谓语形式用动词的过去式 (be 一般用were)，主句用would/ should/ could/ might +动词原形。

【句型结构】

If I were , I would/should/could/might do.

【练习指导】

Q: How to dispose garbage?

A: You know sometimes, people would litter around because they couldnt find any trash can at hand. If I were in the position of my citys mayor, I would invest a large sum of the citys finance placing lots of trash bins along the roadside. Besides, I would carry out recycling programs and dispose of hazardous materials like batteries with far tougher standards. In a word, I think we just need to dispose of garbage in a safe and environmentally friendly manner.

② 虚拟过去时是表示与过去事实相反的假设，if 从句的谓语形式用过去完成时(即had+过去分词)，主句用would / should / could / might + have +过去分词。

【句型结构】

If I had done before, I could have done.

【练习指导】

Q: Describe a place you want to visit

A: If I had got enough time and money three years ago, I could have traveled to Santorini which is one of the most luxurious destinations in Greece.

2. 除了表示虚假条件外，if从句还可以表示对将来的推测，由于是将来还没有发生的，所以谈不上是真实的还是虚假的，只能说这个事情发生的可能性有多大。一般情况下，可以用陈述语气的if从句来表示对一个未来事实的推测，这个事实是完全可能发生的。

【句型结构】

If sb. were to / should + 动词原形，sb. would / should /could/ might +动词原形。

【练习指导】

Q: Will you buy perfume as a gift?

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