"He drinks the milk and eats the bread."
Translation:Dia meminum susu dan makan roti.
Halo teman! Both forms of verbs can be perfectly used in colloquial speech by the same speaker, and they are not necessarily intended to be used as informal and formal. Grammatically, the form "memakan" represents the active verb, and "makan" is the root verb.
Selamat belajar! :)