The document discusses the different types of English conditionals:
1) Zero conditional - for facts that are always true when the condition is met (e.g. if you heat water to 100 degrees, it boils)
2) First conditional - for real possibilities in the future using present tense in the condition and will in the result (e.g. if she gets good grades, she will go to university)
3) Second conditional - for unlikely present or future situations using past tense in the condition and would in the result (e.g. if I had more time, I would learn Italian)
4) Third conditional - for imaginary past situations using past perfect in the condition and