2017年12月英语六级语法:非真实条件句

2017-10-16 11:23:02来源:网络

  在英语六级考试当中,几乎没有单独考察语法的题,但语法知识却贯穿整个试卷。下面新东方在线英语六级频道为大家整理了英语六级语法知识,希望可以为大家带来帮助。

  2017年12月大学英语六级语法知识大全

  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.

  2017年12月大学英语六级语法知识大全

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