1)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届高考英语一轮复习课件:必修5 5-1 Challenging Yourself Ⅰ Beijing Olympics(重庆大学版)
2017届高考英语一轮复习考点规范练:选修6 18 Theme C(重庆大学版)
2017届高考英语一轮复习课件:选修8 8-1 Challenging Yourself Ⅰ Hieroglyphics(重庆大学版)
2017届高考英语一轮复习课件:必修3 3.6 Unit 6 Perseverance and Success(重庆大学版)
2017届高考英语一轮复习课件:选修8 8-2 Challenging Yourself Ⅱ After Twenty Years(重庆大学版)
2016届高考英语二轮复习冲刺练:5 阅读+七选五+完形+书面表达
2017届高考英语一轮复习课件:必修5 5.3 Unit 3 Project Hope(重庆大学版)
2017届高考英语一轮复习课件:选修8 8.4 Unit 4 Man of Virtue(重庆大学版)
2016届高考英语二轮复习冲刺练:1 阅读+完形+语法填空
2017届高考英语一轮复习课件:必修4 4-2 Challenging Yourself Ⅱ Man and Pets(重庆大学版)
2017届高考英语一轮复习考点规范练:选修6 17 Theme B(重庆大学版)
2017届高考英语一轮复习课件:必修4 4-1 Challenging Yourself Ⅰ Exploring the Wonders(重庆大学版)
2017届高考英语一轮复习课件:选修7 7-2 Challenging Yourself Ⅱ Why Do We Learn English Literature(重庆大学版)
2017届高考英语一轮复习课件:必修4 4.2 Unit 2 Stories on the Wheel(重庆大学版)
2017届高考英语一轮复习课件:必修3 3.3 Unit 3 Festivals and Celebrations(重庆大学版)
2017届高考英语一轮复习课件:选修8 8-3 Challenging Yourself Ⅲ Eureka(重庆大学版)
2017届高考英语一轮复习课件:必修5 5-2 Challenging Yourself Ⅱ Wild Antarctica(重庆大学版)
2017届高考英语一轮复习课件:必修3 3-3 Challenging Yourself Ⅲ Hope for Life(重庆大学版)
2017届高考英语一轮复习课件:必修4 4.4 Unit 4 Animals(重庆大学版)
2017届高考英语一轮复习课件:必修3 3-1 Challenging Yourself Ⅰ Wise Outlook(重庆大学版)
2017届高考英语一轮复习课件:选修7 7-3 Challenging Yourself Ⅲ Let Your Mind Wander(重庆大学版)
2017届高考英语一轮复习课件:选修6 6.1 Unit 1 Protecting Our Environment(重庆大学版)
2016届高考英语二轮复习冲刺练:2 阅读+七选五+短文改错+书面表达
2017届高考英语一轮复习考点规范练:选修7 20 Theme B(重庆大学版)
2017届高考英语一轮复习课件:必修3 3.4 Unit 4 Food and Culture(重庆大学版)
2017届高考英语一轮复习考点规范练:选修8 22 Theme A(重庆大学版)
2017届高考英语一轮复习课件:选修8 8.3 Unit 3 A Boy and His Mission(重庆大学版)
2017届高考英语一轮复习课件:选修7 7.2 Unit 2 Man and Man-made Disasters(重庆大学版)
2017届高考英语一轮复习课件:必修5 5.5 Unit 5 Magic Internet(重庆大学版)
2017届高考英语一轮复习考点规范练:选修7 21 Theme C(重庆大学版)