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    大丈夫だよ (daijoubu da yo - it's okay, more casual)

    Grammar & Usage

    fixed expression
    casual

    How it works

    This phrase combines the adjective-like noun (or な-adjective stem) 大丈夫 (daijoubu) meaning 'okay/alright', with the plain form copula だ (da), and the casual sentence-ending particle よ (yo). よ adds emphasis or informs the listener of something they might not know, softening the statement in this context to sound reassuring.

    Sample sentences

    心配しないで、大丈夫だよ。

    Don't worry, it's okay.

    「手伝おうか？」「いいえ、大丈夫だよ。」

    "Shall I help?" "No, I'm okay."

    転んじゃったけど、怪我はないから大丈夫だよ。

    I fell, but I don't have any injuries so I'm fine.

    Quick facts

    nuance:Often used to reassure someone, confirm that something is fine, or decline an offer politely ('No, I'm okay').
    politeness:だ (da) is the plain/casual form of the copula. よ (yo) adds a sense of informing or reassurance, making the statement friendly and informal.

    Mnemonic

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    Example

    心配しないで、大丈夫だよ。

    Don't worry, it's okay.

    「手伝おうか？」「いいえ、大丈夫だよ。」

    "Shall I help?" "No, I'm okay."

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