Why are your eyes red? 
Have you been crying?

How long have you been 
studying English?

How long have you been 
waiting for me?

How long has he been 
playing the guitar?

How long have they 
been watching TV?

How long has this been 
going on?

How long has Tom been 
wearing glasses?

Have they been dancing 
together long?

Why haven't you been 
sleeping well?

Have you been bathing? 
Your hair is wet.

Have you been crying? 
No, I've been cutting 
onions.

How long have you been 
following me?

What have you been 
doing lately?

Has Mary been waiting 
long?

Have you been working? 
You look tired.

How long has she been 
teaching in a school?