高职高专实用英语教程-unit-4-Part-Ⅳ-Grammar

Task 11
Task 12
•1.supposing/if
•2. though •3.than •4.Even if/Even though •5.as •6.as
Task 12
•7.though •8. as if/ as though •9. as well as •10. as long as/ so long as
Task 15
谢谢！
与 将 来 事 实 相 反
If I met Obama some day, I would shake hands with him.
If I were to meet Obama some day, … If I should meet Obama some day, …
if虚拟条件句
had +done
If+主语+ 动词的过去式 （be动词一般用were)
即：If+一般过去时态 （be动词一般用were)
主语+would
( should / might / could )＋动词 原形
If+主语+had +动词的过 主语 + would
去分词
( should / might
即：If+过去完成时态 / could )＋have
与现在事实相反
If I were the schoolmaster , I would let the students get up a little later.
schoolmaster
if虚拟条件句
1、did 2、were to+ 动原 3、should +动原
would ( should / might / could ) ＋动原
would ( should /
might / could ) ＋have done
与过去事实相反
If the boy had driven more carefully, he would not have caused the car accident.
与过去事实相反
If the foreigner had learnt how to swim, he would not have been trapped on the island for four years.
b.若条件从句为否定句，否定词not应 置于主语之后，而不能与were，should， had 等 缩 略 成 weren’t ， shouldn’t ， hadn’t置于句首。
1). If I had seen him then, I would have been very happy.
= Had I seen him then, I would have been very happy.
2). If I should have time, I would go with you. = Should I have time, I would go with you. 3). If I were not so busy, I would go with you. = Were I not so busy, I would go with you.
done
1、If+主语+动词过去式 2、If+主语+were to+ 动词 原形
3、If+主语+Baidu Nhomakorabeahould +动词原
主语+would
( should / might / could )＋动词 原形
形
2.虚拟条件句中的倒装
a. 在 虚 拟 条 件 句 中 ， 如 果 条 件 句 中 有 were, had（助动词）或should时，可 使用倒装结构， were, had,或should 可 提前，if省略。
高职高专实用英语教程-unit-4-Part-Ⅳ-Grammar
1. if 引导的虚拟条件句
①与现在事实相反 ②与将来事实可能相反 ③与过去事实相反
if虚拟条件句
did （be动词用were)
would( should
/ might / could )＋动原
与现在事实相反
If I had a great deal of money now, I would buy a big house for my parents.