Saya tidak mau curang saat ujian.

Because tidak is used to negate verbs, adjectives, and states, while bukan is mainly used to negate nouns or identifications.

In Saya tidak mau curang, the word being negated is mau meaning want to or be willing to, so tidak is the correct choice.

• tidak mau = do not want to / am unwilling to
• bukan curang would not fit this sentence structure

A useful rule:

• tidak
  • verb/adjective
• bukan
  • noun

Mau usually means want to, would like to, or sometimes be willing to.

So Saya tidak mau curang means:

• I do not want to cheat
• or I am not willing to cheat

It can sound a little stronger than just a neutral statement of future action. It suggests intention or willingness.

Compare:

• Saya tidak mau curang = I do not want to cheat / I refuse to cheat
• Saya tidak akan curang = I will not cheat

The first focuses on desire or willingness. The second focuses on what will happen.

Yes, but with an important nuance.

Curang is often an adjective meaning dishonest, unfair, or cheating. In a sentence like this, it works naturally to express the idea to cheat.

So:

• orang itu curang = that person is dishonest / cheats
• dia bermain curang = he/she plays unfairly
• saya tidak mau curang = I do not want to cheat

In the specific context of an exam, another very common word is menyontek, which means to copy answers / to cheat on a test.

So:

• Saya tidak mau curang saat ujian = broad idea of not cheating
• Saya tidak mau menyontek saat ujian = specifically not copying answers during an exam

In Indonesian, you do not need a separate word equivalent to English to in structures like want to cheat.

The pattern is simply:

subject + mau + verb/adjective-like predicate

So:

• Saya mau makan = I want to eat
• Saya mau pergi = I want to go
• Saya tidak mau curang = I do not want to cheat

English uses to after want, but Indonesian does not.

Saat means when, at the time of, or during, depending on context.

In saat ujian, it means during the exam or when taking an exam.

So the phrase gives the time context:

• saat ujian = during the exam
• saat rapat = during the meeting
• saat makan = while eating / during the meal

In this sentence, saat ujian tells us when the cheating would happen.

Yes. All of these can work, though they have slightly different feels.

• saat ujian = during the exam; fairly neutral and natural
• waktu ujian = at exam time / during the exam; very common in speech
• ketika ujian = when taking the exam; a bit more formal or narrative

So these are all possible:

• Saya tidak mau curang saat ujian
• Saya tidak mau curang waktu ujian
• Saya tidak mau curang ketika ujian

If you want the most everyday spoken option, waktu ujian is very common. If you want a neat standard sentence, saat ujian is excellent.

Yes, fairly flexible.

The original order is: Saya tidak mau curang saat ujian.

But you can also move the time phrase to the front: Saat ujian, saya tidak mau curang.

Both are natural. The difference is mainly emphasis:

• Saya tidak mau curang saat ujian = neutral statement
• Saat ujian, saya tidak mau curang = highlights the time frame first

Indonesian often allows this kind of movement, especially with time expressions.

Yes.

Saya is neutral and polite.
Aku is more casual and personal.

So:

• Saya tidak mau curang saat ujian = neutral/polite
• Aku tidak mau curang saat ujian = casual

In conversation, tidak also often becomes nggak or gak:

• Aku nggak mau curang saat ujian

The subject can sometimes be omitted if it is already clear from context:

• Tidak mau curang saat ujian.

But for learners, it is best to keep saya or aku until you are comfortable with when omission sounds natural.

It is basically neutral to slightly formal because it uses saya and tidak.

Levels of style:

• Saya tidak mau curang saat ujian. = neutral, standard
• Aku tidak mau curang saat ujian. = casual but still clear
• Aku nggak mau curang waktu ujian. = very natural in everyday speech

So the original sentence is a good textbook-style sentence and also perfectly normal in real life.

They can say curang, and it is understandable, but for exam cheating, menyontek is often more specific and common.

Compare:

• curang = cheat, be dishonest, act unfairly in a broad sense
• menyontek = copy someone else’s answers, cheat on a test

So:

• Saya tidak mau curang saat ujian = I do not want to cheat during the exam
• Saya tidak mau menyontek saat ujian = I do not want to cheat by copying answers during the exam

If you want a general moral statement, curang is fine. If you want the most exam-specific verb, menyontek is often the best choice.

Yes. Ujian is a general word for exam or test.

It can refer to:

• a school exam
• a university exam
• other formal tests

Examples:

• ujian sekolah = school exam
• ujian akhir = final exam
• ujian nasional = national exam

So in this sentence, ujian naturally means an exam or a test, depending on context.