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1. Form

   • Subject + have/has + verb past participle + complement

2. Use

   • actions that occurred in a non-specific time before now.

3. Is used to

   • describe an experience
     • change in time
       • hits
         • actions that have not yet happened
           • actions at different times in the past.

4. Example

   • Affirmative
     • We have learned English
     • Negative
       • We haven´t learned Englis
       • Interrogative
         • Have you learned English?