"तुम क्या देख रहे हो?"

[Jose.Leitao]

wouldn't an unambiguous plural be more correct? "what are you all watching?"

[wihlke]

तुम is singular 'you' too though. It's only grammatically considered plural but not semantically.

[zeebo7]

Just out of curiosity, what are the rules for referring to 'you plural'. Is it still तुम verb हो and आप verb हैं?

[wihlke]

I think you usually add लोग to signify the plural version as in “तुम लोग क्या देख रहे हो?” and the same for आप. Nothing else changes.

[zeebo7]

Cool, thanks.

[Alok385053]

I need more practices

[Zakas6]

Can i say: What are you looking?

[xyfell]

An English speaker wouldn't say, "What are you looking?" In English, you would say, "What are you looking at?" or "What are you looking for?"

This link provides more detail:
https://dictionary.cambridge.org/us/grammar/british-grammar/look-at-see-or-watch

Hope this helps.