Present Perfect Continuous Tense shows the action started in the past and is still continued.
In Present Perfect Continuous Tense the form of ‘have’ is used with ‘been’ and ‘Present Participle’ of verb.
For third person and singular number ‘has’ is used with ‘been’ and ‘Present Participle’ of verb.
Have a look-
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Go over-
Part 37- fruits signals homework