
The children have
been
making
a snowman for an hour.
My parents have
been
watching
a movie for two hours.
My brother has
been writing
a letter since this morning.
My dog has
been sleeping
on the sofa since noon.
I have been done my homework
since 6 p.m.

I have being studying math for two
hours.

Jane have been practicing the violin
for four hours.

My friends have been played
basketball all afternoon.

The students have be preparing for
the party since this morning.

The girls
have been running
for an hour. (run)
The students
have been waiting
for the bus
for 20 minutes. (wait)
Jiwoo
has been charging his
phone
for 30 minutes.
(charge, his phone)
My uncle
has been repairing his
bike
for three hours.
(repair, his bike)