Question 1

What indicates the past tense in this sentence?

Accepted Answer

Indonesian verbs don’t inflect for tense. Instead, time adverbs do the job; here kemarin (“yesterday”) tells you it’s past.

Question 2

Why is the verb beli not membeli?

Accepted Answer

Beli is the root (base) form. In everyday spoken Indonesian you can use root verbs directly. If you want a more formal or standard style, you add the active prefix meN-: membeli.

Question 3

Why does baru come after sepeda?

Accepted Answer

In Indonesian (unlike English), adjectives follow the nouns they modify. So you say sepeda baru (“new bike”), not baru sepeda.

Question 4

Can I move kemarin to the start of the sentence?

Accepted Answer

Yes. Indonesian word order is flexible for adverbs of time. You can say  
Kemarin saya beli sepeda baru.  
It still means “I bought a new bike yesterday.”

Question 5

What’s the difference between saya and aku?

Accepted Answer

Both mean “I.” Saya is neutral and polite; aku is informal and used with close friends or family.

Question 6

How would I make this sentence more formal?

Accepted Answer

Use the prefixed verb membeli instead of beli:  
Saya membeli sepeda baru kemarin.

Question 7

Is it necessary to add sebuah before sepeda?

Accepted Answer

No, it’s optional. Sebuah is a classifier for one countable object. You can say either:  
Saya beli sepeda baru kemarin.  
or  
Saya beli sebuah sepeda baru kemarin.

Question 8

How can I turn this into a yes/no question?

Accepted Answer

You can add the question particle apakah at the start:  
Apakah saya beli sepeda baru kemarin?  
Or simply raise your intonation at the end:  
Saya beli sepeda baru kemarin?  
In formal style with the prefixed verb:  
Apakah saya membeli sepeda baru kemarin?

Saya beli sepeda baru kemarin.

Breakdown of Saya beli sepeda baru kemarin.

Questions & Answers about Saya beli sepeda baru kemarin.

More from this lesson

Master Indonesian — from Saya beli sepeda baru kemarin to fluency