Da série "How to", segue o conteúdo sobre como empregar modal verbs no contexto de possibilidade.

1. How to Understand Modal Verbs
Possibility.
“There can be no transforming of darkness into light
and of apathy into movement without emotion” (Carl
Jung)
“Não é possível transformar escuridão em luz e apatia
em entusiasmo sem sentimento” (tradução livre)

2. How to Understand Modal Verbs
More?
Used to talk about somebody’s typical behaviour or a
typical effect.
Anna can be very annoying sometimes.
Getting a tattoo can be very painful

3. How to Understand Modal Verbs
Build up sentences.
(bungeejumping/dangerous)
(Holidays/traffic)
(tickets/sold out)

4. How to Understand Modal Verbs
No uso dos Modal Verbs como Possibility, é muito comum o
emprego do May/Might.
Check this dialogue:
Oh, I realized I don’t have my wallet with me!
You may have left it in the car.
I don’t think so.
You may have left it in the office
I don’t think I had it in the morning too.
Hum. I don’t have more ideias. Wait a minute! I guess it’s in my purse!
You’re right! I asked you if you could save it for me last night.
Here it is.
Thank you! You’re an angel!

5. How to Understand Modal Verbs
Have you heard from Luisa?
No, but she hasn’t come to work these last 2 days.
She might be sick.
I guess I’ll call her and see waht happened.
Thinking about possibilities? Make up your plans!
Change to a different city.
Change jobs.
Get married.
Travel abroad.
Buy a new car.