Patricia may be right about the world ending next week.
Patricia puede tener razón...
It is possible that aliens exist but I doubt it...
Es posible que...
I wouldn't be surprised if there wasn't a god...
No me sorprendería si...
The situation could / might be a lot different i fthe government had more money.
La situación podría ser...
Things could / might have been a lot worse if the government hadn't intervened...
Las cosas podían haber sido...
Maybe / Perhaps the situation will get better...
A lo mejor...