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Introduce el texto aquí

1. what it is for

   • it is used when a situation is true or possible

2. structure

   • it is formed if + present simple + simple future
     • what it is
       • conditional sentences or a part of a sentences that expresses a condition it usually starts whith the words "when" "if"

3. examples

   • if is busy now , I will come back tomorrow
     • if you drink too much you´ll get drunk
       • if it is cold, you must wear warm clothes