Riding
Is riding
Sleeping
Am not sleeping
Calling...
I am calling...
Working/Studying
Isn't working
Reading
Is Sarah studying
Flying
Aren't flying
Speaking....
I enjoy speaking to....
Relaxing
Are you doing
Crying
Is the baby crying
Swimming
isn't swimming / is swimming
Going
Are the kids going
Learning...
I am learning...
Drinking
is the woman drinking
Playing
Aren't playing / are playing
Eating
Is eating