The formula for present perfect continuous is Subject+Aux+Aux+V4(ing form)
I have been eating apples for the last three months.
We have been eating apples for the last three months.
You have been eating apples for the last three months.
He has been eating apples for the last three months.
She has been eating apples for the last three months.
It has been eating apples for the last three months.
They have been eating apples for the last three months
We have been eating apples for the last three months.
You have been eating apples for the last three months.
He has been eating apples for the last three months.
She has been eating apples for the last three months.
It has been eating apples for the last three months.
They have been eating apples for the last three months