"Monyet kami besar."

Translation: Our monkey is big.

[Ruth1226Tu]

Why "our monkeys are big." is wrong?

[Femmy813541]

I hope somebody else can give you a more grammar-based explanation, but to me as a native speaker, the Indonesian sentence above implies that there is only one monkey. If there were more than one, you would say, "Monyet kami besar-besar." (The reduplication of the adjective is another way to indicate plurality in Indonesian.)