Cows eat grass.
In English, the verb that follows a singular noun must have an s at the end of the verb. Its that simple. Well not as simple as Bahasa Melayu though.
In Malay, the verb never changes. Be it singular or plural, the verb stays as it is.
Lembu makan rumput.
Lembu-lembu makan rumput.
See how simple Malay is?