why есть can't be used here?
Because the construction when you want to say "X doesn't have Y" is "У X нет Y (in genitive case)". Not as in affirmative.
So нет replaces есть and is also the negative? It isn't only "not", but "not have"?
Yes, the whole sentence structure changes.
can someone explain why них is used? isnt the genitive of they их or with the plurals does it go into Prepositional?
I think if the personal pronoun (их, in this case) starts with a vowel, then it can be preceeded with the letter 'н' when it is used with a preposition (У, here).
Why is it khleba and not khleb??? And is it neto or net??? Also, do you know how to change the Russian from English characters to actual Russian letters (Like the Cyrillic alphabet)
It's хлеба because with нет the genitive case is used.
To change the alphabet used: there should be a switch in the left hand corner of the lesson. Click on it so it changes from Aa to Яя and it will switch to the Russian alphabet.
Why is it у них here but in another example it was у его and not у него?
This one is like a Russian tongue twister for me.
"Они нет хлеба" is marked incorrect.
I have the strongest suspicion as to why it was wrong, but I'd like to see what others think.
Is this correct wording to begin with?
"X has/doesn't have Y" sentences have a unique structure with different declensions
When is "не" and when is " нет" used?
Could you say они нет хлеб ?