I ________ (STUDY) for my chemistry test since 8 AM.
I HAVE BEEN STUDYING for my chemistry test since 8 AM.
OR
I'VE BEEN STUDYING for my chemistry test since 8 AM.
She ________ (WATCH) TV lately.
She HAS NOT / HASN'T BEEN WATCHING TV lately.
I’ve been attending classes since 8 a.m.
Ongoing action
He’s been to studying English.
“to” → He’s been studying English.
She ________ (WORK) at the same café for three years.
She HAS BEEN WORKING at the same café for three years.
OR
She'S BEEN WORKING at the same café for three years.
They ________ (STUDY) much this week.
They HAVE NOT / HAVEN'T BEEN STUDYING much this week.
She’s been calling me every day this week.
Repeated action
They has been waiting for an hour.
“has” → They have been waiting for an hour.
They ________ (PRACTICE) the dance for the Halloween show.
They HAVE BEEN PRACTICING the dance for the Halloween show.
OR
They'VE BEEN PRACTICING the dance for the Halloween show.
He ________ (FEEL) well these days.
He HAS NOT / HASN'T BEEN FEELING well these days.
His hands are green because he’s been painting the walls recently.
Recent action
She been working all day.
Missing auxiliary → She has been working all day.
My brother ________ (PLAY) video games all afternoon.
My brother HAS BEEN PLAYING video games all afternoon.
OR
My brother'S BEEN PLAYING video games all afternoon.
I ________ (SLEEP) properly because of exams.
I HAVE NOT / HAVEN'T BEEN SLEEPING properly because of exams.
We’ve been living here for two years.
Ongoing action
I’ve been call you all day!
"calling" → I’ve been calling you all day!
We ________ (LEARN) English together since pre-kinder.
We HAVE BEEN LEARNING English together since pre-kinder.
OR
We'VE BEEN LEARNING English together since pre-kinder.
We ________ (DO) our homework regularly.
We HAVE NOT / HAVEN'T BEEN DOING our homework regularly.
They’ve been watching horror movies all week.
Repeated action
We’ve been waited for you since 6 PM.
“waited” → We’ve been waiting for you since 6 PM.