雅思語法在條件狀語從句的虛擬語氣是怎樣的

雅思語法|在條件狀語從句的虛擬語氣是怎樣的？，很多同學對于這個問題有疑問和不解，那么下面就跟著中國教育在線的小編詳細了解一下吧。

1. 用if條件從句表示的虛擬條件，是虛擬條件最普通的方式。

① 虛擬現在時表示與現在事實相反的假設，其if 從句的謂語形式用動詞的過去式 (be 一般用were)，主句用would/ should/ could/ might +動詞原形。

【句型結構】

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

【練習指導】

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 虛擬過去時是表示與過去事實相反的假設，if 從句的謂語形式用過去完成時(即had+過去分詞)，主句用would / should / could / might + have +過去分詞。

【句型結構】

If I had done before, I could have done.

【練習指導】

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. 除了表示虛假條件外，if從句還可以表示對將來的推測，由于是將來還沒有發生的，所以談不上是真實的還是虛假的，只能說這個事情發生的可能性有多大。一般情況下，可以用陳述語氣的if從句來表示對一個未來事實的推測，這個事實是完全可能發生的。

【句型結構】

If sb. were to / should + 動詞原形，sb. would / should /could/ might +動詞原形。

【練習指導】

Q: Will you buy perfume as a gift?

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