9.3.3.1 Formación del past perfect continuous


Ejemplos          
  to have (past) + participio perfecto    
  = past perfect
+ verbo pleno
 + sufijo -ing = past perfect 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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