Third conditional

The third conditional states what would have resulted if something different had happened in the past.

If you had been to Africa, you would have talked about its beauty

If I’d received a ticket, I would have paid for it

If they’d won the game, I would have been very annoyed

The form of the third conditional is past perfect, then, usually, ‘would’ + present perfect

In number 1, if the person had received a ticket (which suggests they didn’t), then they would have paid for the ticket. The event never happened (they didn’t buy the ticket) and so, along with other third conditional statements, the result was they would have done XXX (which in this instance, they would have paid for it).

There are instances where we can use continuous forms of the verb.

If they hadn’t walked to school, they wouldn’t have been arriving now.

Conditional                                                                Result

If you’d been rude                                                       I wouldn’t have liked you

If John had watched the video                                 he would have been crying now

If we’d won the game                                                 we could have played in the final

If she’d been lied to                                                    she might not have cried    

In some cases, ‘would’ can be exchanged for other modal verbs which may describe the result more accurately