THIRD CONDITIONAL
If + Past Perfect, would have + past participle If you had studied all of these grammar pages, you would have passed the exam. You can not alter or change the past. You didn't study in the past (something you cannot change now) so you didn't pass the exam. It is an imaginary situation that didn't happen. If you had been more careful, you wouldn't have had an accident. If I had seen you, I would have said hello. If he had asked me, I would have helped him. If you had studied , they would have passed the exam. If I had known , I wouldn't have done that. Notice how this tense can be used to say that you regret doing something or when you are telling someone off (reproaching someone). This type of conditional can also be used when making excuses. We can also change the word order of the sentence... Would have + If + past perfect You would have passed the exam if you had studied all of these grammar pages. I would