Here is a copy of a post about present/past/future tense in Indonesian. Priscilla 86, the poster, is Indonesian.
Our verbs don't change whether an action takes place in the past, present, or future. We simply have to insert time-qualifying words somewhere in our sentences (usually in the beginning). Also, we don't differentiate between singular and plural or male and female.
- Present: She eat the cake.
- Present continuous: She now eat cake.
- Past: Yesterday she eat the cake / she already eat the cake / she just eat the cake.
- Future*: Tomorrow she eat the cake.
The underlined words are the time-qualifying words.
- We do have some sort of future tense. We have a word that means 'will' that we can add to a sentence. Sentence #4 can also be written: Tomorrow she will eat the cake but it will sound formal.
In daily conversation, saying 'Tomorrow she eat the cake' will suffice as you have already qualified the time by saying tomorrow, so you don't really need to add will to the sentence as it is implied.
There are a lot more Asian languages which express tenses in this simple way. And their concept of past/present/future time is as clear as ours. You could call such languages "languages without conjugation".