Present perfect continuous tense

Affirmative

Rule: Subject + has/have+been+V1ing+ object+for/since+time.

Examples: we have been reading books since morning.
She has been reading books for two days.

Negative

Rule: Subject+has/have+not+been+V1ing+ object+for/since+time.

Examples: she has not been reading books for two hours.
They have not been reading books for many years.
Singular = has not
Plural = have not

Interrogative

Rule: Has/Have+ subject+ been+v1ing+ object+for/since+time?
Examples: Have you been liking me since 2015?
Has she been liking me for many months?

Wh Family

Rule: wh+has/have+subject+v3+object+for/since+time?

Examples: why have you been liking him for three years?
When has she been playing cricket since morning?