- Present Perfect Continuous tense expresses the action continuing from the past to the present. And it is mainly associated with since and for.
For Example :-
He has been studying chemistry since 1980.
Mother has been suffering from fever for 10 days.
They have been living here since 1990.
he has been staying in this hotel for three hours.
- Verbs of perception and feeling are not used in perfect continuous tense.They are expressed in simple present tense.

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