She / play the guitar
She is going to play the guitar (+ complement).
Areli / cook
Areli is cooking (+ complement).
Where is your sister? 
- Diana
Could you...
Would you... 
Ask her (Diana) where is her sister?
Don't watch TV.
- Gina
Could you...
Would you...
Tell her (Gina) not to watch TV.
Past tense of
BUY
BOUGHT
He / study English
He is going to study English (+ complement).
Jack and Kelly / drive
Jack and Kelly are driving (+ complement).
Your dog is so cute!
- Luisa
Could you...
Would you...
Tell her (Luisa), her dog is so cute. 
Do you want to come with me?
-Roger
Could you...
Would you...
Ask him (Roger) if he wants to come with me?
What is the difference between present continuous and going to when discussing the future?
Present continuous - Near future
Be going to - Plans and predictions.
Lucy and Helen / travel
Lucy and Helen are going to travel (+ complement).
Luis / dance
Luis is dancing (+ complement).
Where do you live?
-Aldo
Could you...
Would you...
Ask him (Aldo) where does he live?
Don't forget to bring my gift.
-Cristina
Could you...
Would you...
Tell her (Cristina) not to forget to bring my gift.
Past tense of CATCH
CAUGHT
They / be
They are going to be (+ complement).
My aunts / visit
My aunts are visiting (+ complement).
Your notebook is on the floor.
-Lalo
Could you...
Would you...
Tell Lalo (him) his notebook is on the floor. 
Do you like to watch horror movies?
- Luna and Poncho.
Could you...
Would you...
Ask them (Luna and Poncho) if they like to watch horror movies?
What connector do I use when rewriting a yes or no question with ask or tell?
IF
We / buy
We are going to buy (+ complement).
They / work
They are working (+ complement).
Who is your kid?
- Abraham
Could you...
Would you...
Ask him (Aldo) who is his kid?
Are you happy today?
- Monica
Could you...
Would you...
Ask her (Monica) if she is happy today. 
When do I use ASK?
When do I use TELL?
ASK - with questions.
TELL - with sentences.