9.3.3.1 Formazione del past perfect continuous


esempio          
  to have (past) + participio perfetto    
  = past perfect
+ Verbo pieno
  + suffissoo -ing = past perfecto continuous  
  he had been
do
 ing he had been doing
  she had been
writ(e)
 ing she had been writing
  we had been
jump
 ing we had been jumping
  they had been
sell
 ing they had been selling
  you had been
study
 ing you had been studying
  I had been
watch
 ing I had been watching





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