watashi wa daijoubu desu.

topic particle

Breakdown of watashi wa daijoubu desu.

• です: to be
• 私わたし: I
• 大丈夫だいじょうぶ: okay

Questions & Answers about watashi wa daijoubu desu.

What role does は play in the sentence 私 は 大丈夫 です?

は is the topic marker in Japanese. It tells the listener what you’re talking about. In this case, 私 は means “as for me…” or “speaking about me…,” so the rest of the sentence (“I’m okay”) applies to yourself.

Why is 大丈夫 not changing its form here?

大丈夫 is a な-adjective (sometimes called an adjectival noun). Before a copula like です, it stays in its dictionary form without any extra endings. That’s why you say 大丈夫 です instead of something like 大丈夫い です.

What exactly is です and why do we need it?

です is the polite form of the copula (the equivalent of the verb “to be”). It turns 大丈夫 into a polite statement. Without です, you’d have a more casual or incomplete sentence:
• Casual: 私 大丈夫
• Polite: 私 は 大丈夫 です

Can I drop 私 は and just say 大丈夫 です?

Yes! In Japanese, once the topic is clear from context, you can omit it. So if someone asks “Are you okay?”, you can simply reply 大丈夫 です. Omitting 私 は makes it less repetitive and more natural in conversation.

Is 大丈夫 です formal or informal?

大丈夫 です is polite (formal). If you want to be casual with friends or close family, you can say 大丈夫 or even 大丈夫だよ. If you need to be extra formal, you might use additional honorific language, but usually 大丈夫 です suffices.

How do you pronounce 大丈夫 and です?

• 大丈夫 is pronounced “dai-jō-bu.”
• です is pronounced “de-su,” but in natural speech it often sounds like “des.”
Put it together: dai-jō-bu des.

What’s the nuance of 大丈夫 compared to English “OK”?

• 大丈夫 literally means “big/major (大) enough/able (丈夫),” implying “I’m strong/stable,” so “I’m fine/okay.”
• It can also convey reassurance (“It’s alright”) when talking about things or other people.
• English “OK” can be less emphatic; 大丈夫 often feels a bit stronger than a casual “okay.”

Could I use です with other adjectives in the same way?

Yes! For な-adjectives (like 静か “quiet,” きれい “pretty/clean”), you attach です:
• 静か です – “It is quiet.”
• きれい です – “It is beautiful.”
For い-adjectives (like 暑い “hot,” 面白い “interesting”), you also just add です if you want to be polite:
• 暑い です – “It’s hot.”
• 面白い です – “It’s interesting.”