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1. WE USE IT WHEN

   • • SCIENTIFIC LAWS
     • GENERAL TRUTH
     • SCIENTIFIC FACTS

2. IT STATES

3. STTRUCTURE

   • IF AND WHEN
   • IF,,,,THEN
   • IF+SUBJECT+ SIPRESENTMPLE+SUBJECT+PRESENT SIMPLE

4. IS USED FOR

   • • HE DID NOT SING WELL BECAUSE HE DID NOT PRACTICE ENOUGGH
   • • DON T OPEN THE DOOR IF SOMEOME KNOCKS

5. WE BOTH USE THEM WITH

6. STRUCTURE

   • IT+SUBJECT+VERB IN PRESENT SIMPLE /PRESENT CONTINUOUS/PRESENT PERFECT
     • IF IT RAINS TO MORROW

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