"The girls are drinking milk."
Translation:Les filles boivent du lait.
English has two present tenses: simple ("I drink") and continuous ("I am drinking"), but French has no specialised continuous verb tenses. This means that "I drink", "I am drinking", and "I do drink" can translate to je bois (not "je suis bois") and vice versa.
Ils/ Elles boivent
I tried using "Les jeune filles boivent du lait." ... but the duoLingo answer that would have been accepted, was only a sentence without the word "jeune".
Also, the audio pronunciation of some of these words, is (slightly) different from that of my French teacher (more than a half century ago) ... and she had lived in France for years.
Just a comment.
"NRN" ... (however, feel free to reply if you want to.)
Hmm ... I did see a [question and answer] "exchange", at https://www.duolingo.com/comment/1142975/The-girls-drink-milk ... which suggested that perhaps if I DID want to use the plural of the two-word phrase "jeune fille", that ... the (correct) plural for that two-word phrase, would have an "s" [a suffix of "s"] at the end of EACH word; ... that is "jeunes filles"; ... NOT *"jeune filles".
However, That [correction] might be completely unrelated to my mistake ... (which WAS: using the two-word phrase "jeune fille" at all ... [plural or not] ... instead of the single word "fille" [plural or not].)