"You are swimming today."

Translation: आप आज तैर रहे हैं ।

[Tomerji]

Why is the 'rahe' in oblique form?

[Zerenei]

Sentences become plural in Hindi when you are wishing to convey respect when talking about someone, or when you use आप or तुम​, the sentence is conjugated in the plural, hence रहे हैं instead of रहा है

[AnA_language]

The verb रहना agrees with second person singular/plural(respectful word- आप) in the form रहे.
The structure is root verb + correct conjugation of रहना+ correct conjugation of होना

See tips on the conjugation of रहना

[Bananahjones]

I put तुम आज तैर रहा हो and was marked wrong. I think that answer should be accepted as far as I can tell, though if there is a reason it is not correct I’d be happy to hear it.

[Zerenei]

तुम आज तैर रहे हो* should be accepted.

[raz.musaviyan]

There is just "आप आज तैर रहे हैं" why हैं not हो?

[Supernovae11]

The sentence is conjugated in plural form when we use "आप" to be respectful

[Mi-ok.1213]

In this sentence , आप is use for respective words whit आप in this sentence it will come है not हो , and if the sentence would be starting from तुम then it would be हो

Example :
तुम आज तैर रहे हो।(is right)
आप आज तैर रहे है।(इस right)

[antoniojack]

Why hain instead of ho?

[AnA_language]

हो only agrees with second person singular and plural, तुम(you) and तुम लोग(you/you all). हैं agrees with हम and with third person plural like with वे, ये etc.

See tips by the mods:

--@aaditsingh8 →https://forum.duolingo.com/comment/28223229
--@vinay92
→https://forum.duolingo.com/comment/35468773

[MichaHerma5]

Why is तुम आज तैर रहा हो incorrect?

[AnA_language]

The verb रहना agrees with second person singular/plural in the form of रहे.
The structure is root verb + correct conjugation of रहना+ correct conjugation of होना

See tips on the conjugation of रहना
Yes , if you want to write "तुम आज तैर रहे हो।" or "तुम आज तैर रही हो।" in translation for "You are swimming today" ,then, both are correct and should be accepted.