"She is my girl."
Translation:Sie ist mein Mädchen.
Easy way to remember this would be by assuming the word to be a neutral noun because, until a girl reaches womanhood she doesnt develop all the characteristics of a woman, and is more or less of a "neutral" gender. Sounds stupid, i know, but probably a way to remember it. Although this doesnt explain why der Jung isnt neutral.. Guess i'll never be a great teacher :-/
"Ihr" could translate to "her", "their", "they"... in different sentences, but not to "she". "She" will be "sie".
In other words, "she" in this sentence is in nominative case, so it translates to "sie". The possessive part here is "my", hence the "mein" equivalent.
Can "She is my girl" also be translated as "Sie ist meine Mädel" oder "Sie ist meine Freundin" like in American english sometimes instead of saying "she is my girlfriend" we say "she is my girl." But does this translatr the same in German? Or does "Sie ist mein Mädchen - she is my girl" like synonamous with something like "she is my daugher" because in american english depending on context she is my girl could mean she is my female child or she is my Girlfriend.
"Sie ist meine Frau" means "She is my wife". "Frau" can mean both "woman" and "wife". "My wife" isn't the same as "my girl".
"Meine Freunden" is grammatically wrong German -- it would have to be "meinen Freunden" (to my friends). But since this doesn't make any sense in this context, I guess the DL model solution actually read "Sie ist meine Freundin" (She is my friend/girlfriend). That's not an exact translation, but the meaning of "She is my girlfriend" is similar to the meaning of "She is my girl", at least in some contexts. So maybe that's why this solution is apparently now accepted as well.
"Die Freundin" is the feminine form of the word "der Freund". "Der Freund" = the male friend/boyfriend; "die Freundin" = the female friend/girlfriend.
Many nouns that describe people have a masculine and a feminine form, and the feminine form often ends in -in. Ex. der Student (the male student) - die Studentin (the female student); der Professor (the male professor) - die Professorin (the female professor).
About "meine" - like the articles, the possessive determiners (my, your, his, etc.) agree in gender/number (masculine, feminine, neuter OR plural) and case with the noun they refer to. In the sentence "Sie ist meine Freundin", "Freundin" is:
2) nominative (because the nominative case is always used after the verb "sein" [to be]).
In German, the feminine nominative form of "my" is meine. And yes, "meine" is also used for plural nominative.
See this table: