1). If it had rained last night, (过去) I would be very cold today.（现在）

2). If I had taken your advice, (过去) I should have no trouble with the work now.（现在）

3）有时候，假设的情况不以条件从句表示，而是通过一个介词短语来表示，有时可以通过上下文或其他方式表示。这种句子称为含蓄条件句。

1). We could have done better under more favourite conditions.

2). He would have given you more help, but he has been so busy.

3). Such mistakes could have been avoided. (if we had been more careful)

4). But for your help, we couldn't have finished the work ahead of time.

6). With your help we could have done better.

7). If only I were a bird!

二． 虚拟语气在宾语从句中的运用

1． 在动词 suggest, order, demand, propose, request, insist, require, desire等后的宾语从句中， 用虚拟语气（即should + 动词原形）来表示愿望，建议， 命令，请求等。

常见动词：

一个坚持：insist（坚持要求）

两个命令：order, command

三个建议：advise, suggest, propose

这些动词后面的宾语从句要使用虚拟语气用法。即从句中的动词 使用should + 动词原形，或者将should省略。

1). I suggest that we (should) set off at once.

2). They requested that we (should) send a delegation to their country.

3). The doctor suggested that she (should) not smoke.

4). He insisted that she (should) go first.

2．wish (that) + subject + a past tense（与现在事实相反）

1). I wish I were as strong as you.

2). I wish every day were my birthday.

3. wish (that) + subject + past perfect（与过去事实相反）

1). I wish you had told me earlier.

2). I wish / wished I hadn't eaten so much watermelon.

3). The party was awful, I wish I had never gone to it.

4. wish (that) +subject + would 将来不大可能实现的愿望

1). I wish it would rain tomorrow.

2). I wish you would succeed this time.

3). I wish you could fly back to me.