Unit 15 Period Ⅳ Grammar-2020-2021学年高中英语必修5【导学教程】同步辅导（北师大版）课件PPT

Unit 15　Learning 英语·必修5（BSD） 菜 单 Period Ⅳ　Grammar Unit 15　Learning 英语·必修5（BSD） 菜 单 语法精讲·技能培养 虚拟语气 ●要点诠释 1．概念 虚拟语气所表示的不是客观事实，而是说话人的一种愿望、假设、怀疑、猜测或建议等。 2．虚拟语气在if条件句中的用法 (1)虚拟条件句中谓语动词的构成形式 Unit 15　Learning 英语·必修5（BSD） 菜 单 if条件句中的谓语动词 主句的谓语动词 与现在 事实相反 动词过去式did(be→were) should/could/would/might＋动词原形 与将来 事实相反 should/could/would/might＋动词原形 与过去 事实相反 had＋过去分词 should/could/would/might＋have done Unit 15　Learning 英语·必修5（BSD） 菜 单 ①与现在事实相反 If I were a boy，I would go alone. 如果我是个男孩，我就独自去。 If people drove more slowly，there wouldn’t be so many accidents. 如果人们开车都慢一点的话，就不会有那么多交通事故了。 If I had enough money now，I would buy a car. 我现在要是有足够的钱，我就买辆车。 (含义是：我现在没有钱，因此买不起车)。 Unit 15　Learning 英语·必修5（BSD） 菜 单 ②与将来事实相反 If it rained/should rain/were to rain tomorrow，our plan would be put off. 假如明天下雨，我们的计划就得推迟。 If you missed/should miss/were to miss the film tonight，you would feel sorry for it. 如果你今晚错过这场电影的话，你会后悔的。 ③与过去事实相反 If you had studied hard，you would have passed the exam. 如果你当时努力的话，你早已通过考试了。 (含义是：过去你没努力，因此没能通过考试。) Unit 15　Learning 英语·必修5（BSD） 菜 单 If you had come earlier，you would have met him. 如果你来得早一点的话，你就已经见到他了。 (2)注意事项 ①倒装 if虚拟条件句中有should，had或were时if可以省略，从句中要用倒装。 Had I worked hard，I would have surely succeeded. ＝If I had worked hard，I would have surely succeeded. 如果我当时努力学习的话，我一定会成功。 Were she my daughter，I wouldn’t allow her to go to study abroad. ＝If she were my daughter，I wouldn’t allow her to go to study abroad. 如果她是我女儿，我不会允许她去国外学习。 Unit 15　Learning 英语·必修5（BSD） 菜 单 ②错综条件句 有时主句与从句所指的时间不一致，它要求主从句的时态根据实际的时间概念来确定。 If she had followed the doctor’s advice，she would be quite all right now. 如果她当时听医生的话，她现在会好了。 If you had told me the news yesterday，I wouldn’t be so worried now. 如果你昨天告诉我这个消息，我现在就不会这么担心了。 Unit 15　Learning 英语·必修5（BSD） 菜 单 3．用在wish的宾语从句中 虚拟语气用在wish的宾语从句中，意为“但愿……，希望……；要是……就好了；可惜……”。从句谓语动词的形式为： (1)与现在事实相反，谓语用did/were。 (2)与过去事实相反，谓语用“had＋过去分词”。 (3)与将来事实相反，谓语用“would/might/could/should＋动词原形”。 I wish you had come to the lecture yesterday. 要是你昨天来