PRESENT PERFECT:

• 009:   Present Perfect: I have done
  
• 010:   Present Perfect: I have done, about our life experience (2)
  
• 010:  Present Perfect until now …
  
• 010:   Present Perfect with SINCE and FOR
  
• 011:   Present Perfect Continuous: I have been doing
  
• 012:   Present Perfect Simple or Present Perfect Continuous?
  
• 012:   Present Perfect Simple or Present Perfect Continuous? (2)