Kamu tentu sudah sarapan.

Of course you have already had breakfast.

Breakdown of Kamu tentu sudah sarapan.

• kamu: you
• sudah: already
• sarapan: to have breakfast
• tentu: of course

Questions & Answers about Kamu tentu sudah sarapan.

What does kamu imply in terms of politeness and who do you use it with?

Kamu is the everyday, informal “you” (singular).

• Use kamu with:

  • Friends
  • People your age or younger
  • People you are close to

• Avoid kamu with:

  • Strangers who are clearly older
  • Teachers, bosses, or people you should show respect to

With those people, you’d usually replace kamu with:

• Anda (neutral, polite “you”)
• Or titles like Bapak / Pak (sir, Mr.) and Ibu / Bu (ma’am, Mrs.), often without saying Anda at all.

So Kamu tentu sudah sarapan sounds friendly/informal, not formal or respectful.

Is kamu singular or plural? How do I say “you (plural)”?

Kamu is grammatically singular (“you” to one person).

To say “you” plural, use:

• kalian = “you all”, “you guys”

Examples:

• Kamu tentu sudah sarapan. – said to one person.
• Kalian tentu sudah sarapan. – said to a group.

In casual speech, some people may still use kamu while speaking to more than one person, but if you want to be clear and safe as a learner, use kalian for plural.