Why is this not "trinken"? Is "Jeder" considered singular?
Yes.
Why "dieses"?
'Wasser' a neuter noun, so the declension is -es. http://en.wiktionary.org/wiki/diese#Declension
How about "Alles trinken dieses Wasser?"
"alles" (everything) doesn't work here, but "alle" does.
Alle trinken dieses Wasser.
I put "Alle", and it came out wrong, is there any difference?
Did you put "alle trinkt"?
So "Jeder trinkt dieses Wasser" and "Alle trinken dieses Wasser" mean "Everyone drinks this water."?
Yes I did. haha why is it wrong?
"alle" is plural. So you need to use "trinken" instead of "trinkt".
Thanks!
I tried with "Alle trinken dieses Wasser" and got it wrong. :(
Report it next time you come across it.
Why "Jedes" is wrong?
or to ask - Why JedeR? Please, I really need answer!
everyone = jeder
every [xyz] = jede/r/s [xyz]
Thank you. Then, everybody will be also JedeR or not?
Why I have to use masculin?
Why not jedermann?