"jer" is plural, just as "you" can be plural.
"det" is singular, while "those" is plural.
it is a question of english then-is it a correct sentence in english?"it(sing.) is(sing.) you(plur.)." I guess he asked this.:)
"It is you." is correct in English for both singular and plural "you". You could say "It is them." and "It is us." in response to "Who is it?" (at the door) "Who" and "it" are singular though unknown person place holders that could turn out to be holding the place for more than one person at the end of the answering sentence.
I'm also wondering if it shouldn't be all in plural in English. I know that in Danish it's an expresion- you use "Det er" for both- sing. and plur. But how about English? How to distinguish if one is talking about one or many yous.
This is an expression in English also. You simply cannot tell in this sentence; but if I am talking to you, then you would know how many you are. You would only know by context.
At a certain point, you have to accept that English does not have a specifically singular word for "you" any more.
Sounded like "De har jer".
Sound comparison: https://translate.google.com/#da/en/De%20har%20jer.%0A%0ADet%20er%20jer.
Of course, there is. Though bouth are "you", "dig" is singular, "jer" is plural.
Great.. Because of your comment all i can think of is cowboy danish....Howdy jer :P
The difference is the same than between "me" and "I", in english.
jeg -> mig du -> dig han/hon -> ham/hende vi -> os I -> jer de -> dem