QUESTIONS WITH PRESENT PERFECT CONTINOUS

have 

                   +       subject     +     been        +    v (ing)            +         comp?
has 

EXAMPLE:

have you been running the race since 15 years old ?

yes , i have . I have been running the race since 15 years old .
no, i haven´t . i have been running since 11 years old.

have you been sitting here for two hours?X
no , i haven´t . i have been sitting here for one hour.

has she been sitting  in the steps ? 
yes , she has . she has been sitting in the steps.

has he been waiting me since 2:00 p.m?
no , he hasn´t . he has been waiting me since 9:00 a.m

have they been playing computer games since the morning?
yes,they have.. they have been playing computer games since the morning.

have we been working all day ?
no , we haven´t . we have working in the morning.