Present
Prfect Continuous Tense
Present Perfect Continuous Tense: Present Perfect Continuous Tense is used to express the
action that has been going for a period of time.
I
have been doing the work since morning.
***Structure-1: Sub+have/has been+v+ing+ob+extension.
Have and has are used
according to the rules of present perfect tense.
for is used if it is period of time, since is used for if it seems particular time.
They
have been trying to do the work for two hours.
I
have been waiting for you since morning.
She
has been trying to memorize the poem for one hour.
They
are playing football since morning.
I
have doing the sums for two hours.
Negative Sentence:
***Structure-2-: Sub+have/has+not+ been+v+ing+ob+extension.
They
have not been starving for two days
It
has not been raining since morning.
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