Question

coloque as orações da forma negativa my brother teaches manu languages​

Answer 1

Creio que um erro de escrita possa ter ocorrido, então assumi que My brother teaches manu languagues seria My brother teaches many languages ou My brother teaches me languages.

Dessa forma, as possíveis formas negativas seriam:

My brother doesn't teach manu languagues.

My brother doesn't teach many languages.

My brother doesn't teach me languages .