ucwords(Present perfect continuous tense)- What is ucwords(Present perfect continuous tense), ucwords(Present perfect continuous tense) Exercises -4

To express an activity began in the past and is still going on.For definite time we use ‘Since’ & for duration of time we use ‘For’

She has been dancing for an hour.

Positive sentence
Subject + has/have + been + v3rd form + ing + object

I have been studying since 2 o’clock

Negative sentence
Subject + has/have + not + been + v3rd form + ing + object

She has not been singing for two hours.

Interrogative sentence
has/have +Subject + been + v3rd form + ing + object

Have you been waiting for an hour?

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