2022年6月大学英语四级语法知识：非真实条件句

　　语法是很多考生在复习英语四级中经常忽略的考点，复习语法时最好结合练习题更能巩固基础和加深印象，新东方在线英语四级频道为备考四级的同学们整理了“2022年6月大学英语四级语法知识：非真实条件句”，希望可以帮助大家，提前预祝大家考试顺利!

　　2022年6月大学英语四级语法知识：非真实条件句

　　16.2 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.

　　2022年6月大学英语四级语法知识(汇总)

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