2. WHAT IS THE STRUCTURE?
When you want to express a possible future situacion and its
consequence. You have to use this structure
Note: visit this link and discovery the structure
http://www.ecenglish.com/learnenglish/lessons/first-conditional

3. When you can use first
conditional?
If you don-t know, you will learn here.
 http://www.englishclub.com/grammar/verbs-
conditional_2.htm
If you dont understand the explanation in english,
you will read in spanish.
 http://personales.ya.com/mjandres/archivos/C
ONDITIONAL1.pdf