Understanding English Conditional Sentences

Zero Conditional

Verdad absoluta: If it snows, it is cold.
Snows: present simple, is: present simple

First Conditional

Probabilidad (Unless: si no)
If I eat too much, I will get fatter.
Present simple, future

Second Conditional

Improbable (unlikely)
If I won the lottery, I wouldn't travel around.
Past simple, wouldn't + infinitive.

Third Conditional

Imposible
If I had studied, I would have passed.
Would have + past participle, past perfect