"Julia can play but Peter can not sleep."

Translation: जूलिया खेल सकती है लेकिन पीटर सो नहीं सकता।

[xyfell]

Why does this sentence not end with है ?

[emrys29]

You can drop the 'hai' if the sentence is negated. I don't recommend doing it though.

[deactivated user]

Let poor Peter sleep :'(

[GabrielBou109736]

I think that Duo wants us to know that Peter has the ability to not sleep, not that he is forbidden to. He CAN not sleep: वह नहीं सो सकता है। He can't sleep: वह सो नहीं सकता है। but that's a wild guess...

[pmhashir]

Your guess is wrong. It can be either permission or ability, similar to how it's in English.

[Markker26]

can someone explain why the hai applies sometimes in the first part of a compound sentence and sometimes is at the end of the second part of the compound sentence

[Wilbur111]

It's only not at the end of the second part because you don't need one for a negative statement. And the second half is negative.