The third conditional is used to talk about unreal past situations by using the structure "if + past perfect, would have + past participle". It expresses a condition in the past that did not happen. Examples are given using "if I had worked harder" or "if we had caught an earlier train" to talk about past possibilities that were not realized. The document provides explanations, examples, and exercises to practice forming third conditional sentences.

1. THIRD CONDITIONAL:
No possibility
With the third conditional we talk about
the past. We talk about a condition in
the past that did not happen. That is
why there is no possibility for this
condition. The third conditional is also
like a dream, but with no possibility of
the dream coming true.

2. IMPORTANT POINTS
• We can use other modal verbs in place of would.
If they'd come earlier, they could have got a seat.
• Mixed conditional if + past perfect + would + bare
infinitive
Sometimes we want to say that the result of an
action is now.
If it hadn't rained, I would have gone to the beach.
(In reality, it rained in the past, and I didn't go to
the beach in the past)
If it hadn't rained, I would be at the beach / would
be sitting on the beach.

3. EXAMPLES
• If I had worked harder at school, I would have got
better grades.
• If I had had time, I would have gone to see him.
But I didn't have time.
• If we had bought that house, we would have had to
rebuild the kitchen.
• If we had caught the earlier train, we would have
got there on time but we were late.
• http://www.englishgrammarsecrets.com/thi
rdconditional/exercise1.html

4. EXERCISES
1. He crashed his car, because he fell asleep while driving.
If he ______________asleep while driving, he ____________his
car.
2. We couldn't go to the concert, because we didn't have
enough money.
If we _____________________ enough money, we ___________to
the concert.
3. I lost my job because I was late for work.
I ___________________ my job if I _______________late for work.
4. The wind was so strong that the bridge collapsed.
If the wind ______________________so strong, the bridge
________________.
5. I couldn't call Sally because I had lost her number.
I ___________ Sally if I _______________her number.