Respuestas
Respuesta:
2) We wouldn't have missed the start of the film if you'd been here on time.
3) If they'd seen the sign, they wouldn't have sat down.
4) Ella would have finished the race if she hadn't fallen over.
5) If I'd taken my umbrella, I wouldn't have got wet.
6) He wouldn't have crashed if he'd stopped at the red light.
Explicación:
En la primera parte del third conditional
se usa el past perfect, que se forma usando had + (verbo de la tercer columna/past participle)
por ejemplo
He had flown a plane
flown = past participle de fly
en la segunda parte del third conditional (después de la coma) se usa el would + present perfect
el present perfect no es tan diferente al past perfect. Se mantiene el verbo de la tercer columna pero en vez de usar had se usa have
have + (verbo de la tercer columna/ past participle)
por ejemplo:
I have done my homework
done = past participle de do.
(espero no haberte mareado y espero que se haya entendido por lo menos algo)