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We use the Present Perfect Continuous Tense to describe an action that began in the past progress and may also continue in the future.
Time expressions:
Affirmative Form
Subject + have / has + been + verb(ing)...
I have been waiting for the train.
Negative Form
Subject + haven't / hasn't + been + verb(ing)...
I haven't been waiting for the train.
Question Form
Have / has + subject + been + verb(ing)...?
Has she been watching TV?
Negative Question
Haven't / hasn't + subject + been + verb(ing)...
Haven't they been looking for Victoria?
a. The poor man has been waiting at the corner for an hour.
b. I have been practicing the piano for twenty minutes.
c. How long have you been learning English?
c. How long have you been living in this city?
e. The students have been waiting for the results.
f. Henry has been watching TV since seven o'clock.
102 videos|157 docs|166 tests
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102 videos|157 docs|166 tests
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