a juani hernandez 12 éve
2599
Present Perfect Simple vs Present Perfect Continuous
Present Perfect Continuous
have+been+verb-ing
Exceptions when adding -ing
final "ie" becomes "y"
lie-->lying
After a short, stressed vowel, the final consonant is doubled
sit--->sitting
Have I been waiting for you?
I have not been waiting for you
I have been waiting for you
Present Perfect Simple
regular verbs
Have they worked?
They have not worked
They have worked
have+infinitive+-ed
irregular verbs
Have they spoken?
They have not spoken
They have spoken
have+ participle form