Conditional Sentences Type 3

前幾天講過如何用 type 1 和 type 2 conditional sentences 。如果已經忘記了，請先複習一下：


Type 1: http://grammarfun101.blogspot.com/2011/08/conditional-sentences.html 

Type 2: http://grammarfun101.blogspot.com/2011/08/conditional-sentences-type-2.html 


先看看一些 type 3 的句子： 

If you had told me that you were coming, I would have picked you up at the airport.
If I had had her phone number, I would have given her a call.
If you had seen him, you would have fallen for him.
If he had warned me, I would have been more careful. 

在 conditional sentences type 3 中，if-clause 裡的動詞是過去完成式 (past perfect tense)，而 main clause 的動詞是條件完成式 (perfect conditional)。[note: perfect conditional = would/should + present perfect tense]

Type 3 conditional sentences 所表達的時態是過去的，而條件不能實現，因為 if-clause 內所提及的事或行動跟本沒有發生。它就有如我們中文的：如果我當初什麼什麼，我就會（或不會）什麼什麼。

再看看上面的例句： 

If you had told me that you were coming, I would have picked you up at the airport. (But you didn't tell me, so I didn't pick you up.) 

If I had had her phone number, I would have given her a call. (But I didn't have it, so I didn't give her a call.) 

If you had seen him, you would have fallen for him. (But you didn't see him.) 

If he had warned me, I would have been more careful. (But you didn't warn me.)

如果我是 Bosco，我可能會說： 

If I had known that there were paparazzi outside, I would have drawn the curtains.

如果我是 Edison，我可能會說： 

If I had known that people could gain access to those photos on my hard drive, I wouldn't have taken them in the first place. 

請留意，在以上的句子中，如果以 had 作為句子開頭，if 可以刪去： 

If you had told me that you were coming, I would have picked you up at the airport. 

可以改寫成： 

Had you told me that you were coming, I would have picked you up at the airport.  

If you had seen him, you would have fallen for him. 

可以改寫成： 

Had you seen him, you would have fallen for him.  

還有，我們可以用 could 或 might 去取代 would 這個字：

If we had found them earlier, we could have saved their lives.