1) We couldnt have achieved so much without your help (= If we had not had your help).
2) Without solar radiation, animals and plants would die.
3) With better equipment, we could have done it better.
4) But for electricity (= If there were no electricity), there would be no modern industry.
5) I should have returned the book last week, but I was so busy that I forgot to do so.
6) He was having a meeting; otherwise he would have come over to help us.
7) He felt very tired yesterday, or he would have attended the party.
4. 在某些隐含的虚拟条件简单句中, 虚拟语气可通过上下文表现出来. 谓语动词用虚拟形式.
1) Any men in his position would have done like that.
2) You should (ought to) have come earlier.
II. 虚拟语气祈使语气的混合使用
在有些情况下, 条件从句中的谓语由should + 原形动词 构成, 这时主句的谓语动词既可以是虚拟语气或陈述语气, 也可以是祈使语气.
1. If it should rain, the plan will / would be called off.
2. Should anyone phone, please tell them Im busy.
3. Even if (If) it should get stormy, I will go.
III. 表示要求, 建议, 命令的虚拟语气
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