"We are eating."
"Manges" is the conjugation for "tu".
For "nous", the conjugation is "mangeons".
There is no "avons" (= have) in this sentence.
"We are eating" describes what we are doing at this very moment, but the continuous present tense does not exist in French. As a consequence, both "we are eating" and "we eat" must be translated to the French present tense: "Nous mangeons."
"Nous sommes mangeons" would add 2 conjugated verbs, which is not correct (we are eat, he is eats...).
"Are eating" is a continuous present formed with the auxiliary "to be", conjugated, and the present participle/gerund form of the verb (-ing)
Such a construction does not exist in French.
"We are eating" translates to "nous mangeons", and "we eat" as well.
On is grammatically a 3rd-person pronoun, even when it has a 1st-person meaning: the corresponding verb form is mange, not mangeons.
You can either say "nous mangeons" or "on mange", but "on mangeons" is not correct.
How are you supposed to remember that? They need to make it easier for beginners.
To remember things, you have to repeat them many times. Then, it becomes much easier.
I agree. I also feel as though there is sincerely no easier option for learning. Ive used this app to help me with German & it's quicker at teaching than my real German speaking teacher