INT C/D: Conditionals

http://www.englishpage.com/conditional/conditionalintro.html
http://www.ego4u.com/en/cram-up/grammar/conditional-sentences
http://www.usingenglish.com/articles/english-conditionals-an-introduction.html
http://www.grammar-quizzes.com/conditionsum.html

CONDITIONALS
Meaning of the “If clause”	Verb Form in the “If clause”	Verb Form in the “Result Clause”	Examples
Zero Conditional (FACTUAL): Always true in the present	Simple present	Simple present	If I have enough time, I write to my parents every week.
1st Conditional (FUTURE): True in the future	Simple present	Will/be going to	If I have enough time tomorrow, I will write to my parents.
2nd Conditional (HYPOTHETICAL): Untrue in the present/future	Simple past	Would + base form	If I had enough time now, I would write to my parents.
3rd Conditional (HYPOTHETICAL IN THE PAST): Untrue in the past	Past perfect	Would have + past participle	If I had had enough time, I would have written to my parents yesterday.