15 minutes
She has been waiting for15 minutes.
for 20 minutes
He has been running for 20 minutes.
a book
She has been reading a book.
for a while
They have been talking for a while.
for ages.
They have been dancing for ages.
Why is he dirty?
He has been working in the garage for hours.
Why is she tired?
The baby has been crying for hours.
What has the cat been doing for the last 10 minutes?
The cat has been hitting the bell for 10 minutes.
since she graduated
She has been taking photos since she graduated.
for 15 minutes.
They have been eating dinner for 15 minutes.
on-line / for 6 months.
They have been learning maths on-line for 6 months.
What has the dog been doing for the last half an hour?
It has been dancing.
Why is she sleepy?
She has been playing with her toys.
laugh/for the past 10 minutes
They have been laughing for the past 10 minutes.
Mrs Strict ____ since forever.
Mrs Strict has been teaching since forever.
since they were 7
They have been sitting together since they were 7.
