If the question is referring to the command in the following context, then the command is "Mange(z)-le maintenant" with the "z" being added for the "vous" form and not being present for the "tu" form:
Person 1: I'm not that hungry. (Je n'ai pas tant de faim.)
Person 2: I don't care, eat it now! (Ça ne m'importe pas, mange-le maintenant.)
If you have a sentence with the words "eat now" in sequence such as the example below, conjugate "manger" to the proper subject and use "maintenant" to mean "now":
Person 1: It's 12:00, so I eat now. (Il est midi, ensuite je mange maintenant.)
Maintenant, je peux manger.
voulez-vous manger maintenant
to eat is spelled 'manger' in French
To eat cheese is "manger du fromage" in French.
"I love to eat" in French is j'aime manger.
They have to eat (they must eat) is "ils doivent manger" in French. They have (something) to eat is "ils ont à manger".
to eat a lot is 'manger beaucoup' in French. Link goes to conjugation.
Maintenant?
'maintenant'
Its .. nous mangeons
it is vas mange
manger dehors