对于大学英语四六级考试来说，语法非常重要。坚实的语法是英语水平进阶的充分必要条件。但现实情况是，不少人对语法学习并没有一个清晰的概念，甚至忽视语法学习。在此小编希望考生们重视起最语法的复习。今天文都四六级网给大家盘点2020年上半年大学英语六级语法：非真实条件句，希望对您有所帮助。

大学英语六级语法：非真实条件句

时态：可以表示过去，现在和将来的情况。它的基本特点是时态退后。

a.　 同现在事实相反的假设。

句型 ： 条件从句　　　　　主句

一般过去时　　　should( would) +动词原形

If they were here, they would help you.

b.　 表示于过去事实相反的假设。

句型： 条件从句　　　　　 主句

过去完成时　　　 should(would) have+ 过去分词

If she had worked harder, she would have succeeded.

The rice would not have been burnt if you had been more careful.

If my lawyer had been here last Saturday, he would have prevented me from going.

If he had come yesterday, I should / would have told him about it.

含义：He did not come yesterday, so I did not tell him about it.

If he had not been ill and missed many classes, he would have made greater progress.

含义： He was ill and missed many lessons, so he did not make greater progress.

c.　 表示对将来的假想

句型：　 条件从句　　　　　　 主句

一般过去时　　　　　 should+ 动词原形

were+ 不定式　　　　 would + 动词原形

should+ 动词原形

If you succeeded, everything would be all right.

If you should succeed, everything would be all right.

If you were to succeed, everything would be all right.

语法的学习过程会觉得条目繁多，很难记，而且枯燥无味，这种情况下，学习应该寻找的是语法的学习方法。掌握方法，在学习过程中才能克服困难。更多四级语法、六级语法请及时关注文都四六级网站。

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