Indonesia Doesn't Have Verb Tenses/ Verb Conjugation

Indonesia doesn’t have verb tenses or conjugation. Indonesian verb would always the same whether it happened in the past or it happened today. Indonesia do have time marker and Adverb instead of modifying the verb.

PRESENT TENSE:
saya makan nasi.
I eat rice

PAST TENSE:
saya makan nasi kemarin.
I ate rice yesterday.

PRESENT CONTINUOUS:
saya sedang makan nasi.
I am eating rice.

PRESENT PERFECT:
saya sudah makan nasi.
I have eaten rice.

FUTURE TENSE:
saya akan makan nasi.
I will eat rice.

PAST PERFECT:
saya pernah makan nasi.
I had eaten rice.

PAST CONTINUOUS:
Saya sedang makan nasi ketika ia tiba.
I was eating rice when he arrived.

A little bit note:
1. sudah means an action have been done. It didn’t tell us whether an action have just been done or it was done yesterday. So the adverb sudah can be used in either present perfect or past perfect. Indonesian usually add time maker. For example:

saya sudah makan nasi baru saja.
I have just eaten rice.

“baru saja” is an phrase which show an action happened a few moments ago. In informal, it sometimes abbreviated to “barusan”. The phrase came from the word baru (new) and saja (only).