Basic enders
The plain copula, the three core sentence-final particles (ka, ne, yo) and their most common combination, yo ne. They share one base sentence so that only the ending changes.
da
polite desuis (plain copula)
だ です
Plain 'is' after nouns and na-adjectives. A bare final da is mostly self-talk or a sudden realisation and can sound blunt, so to tell someone, drop it (ashita yasumi) or add yo or ne (ashita yasumi da yo). It stays before ne, yo and kedo. Polite speech has no self-talk, so the polite pair is a plain statement.
a, ashita yasumi da
Oh right, I'm off tomorrow!
あ、明日休みだ
ashita wa yasumi desu
I'm off tomorrow.
明日は休みです
It becomes na before n da and no (yasumi na n da) and never follows an i-adjective (takai, not *takai da). Dropping da before yo or ne (yasumi yo, kirei ne) is common but feminine-leaning; da yo / da ne is the neutral form.
ka
polite desu ka / -masu kaquestion marker
か ですか/〜ますか
Turns a polite sentence into a question when said with a rising tone. Said falling, polite desu ka is a realisation instead (sou desu ka = I see). Casual questions drop ka and rise, so bare casual ka is mostly heard in musing realisations (sokka, ashita yasumi ka).
a, ashita yasumi ka
Oh, tomorrow's a day off, huh.
あ、明日休みか
a, ashita wa yasumi desu ka
Oh, tomorrow's a day off, I see.
あ、明日は休みですか
For a casual question, drop ka and raise the pitch: ashita yasumi? The real polite question is ashita wa yasumi desu ka? with a rising tone. A casual rising ...ka? (daijoubu ka?) sounds rough and masculine. Neutral casual ka appears in musing (sokka), in jaa iku ka (let's get going, then) and inside sentences (nani ga ii ka wakaranai = I don't know what would be good).
ne
polite desu ne / -masu neright? / isn't it
ね ですね/〜ますね
Invites the listener to share or agree with what you say. It softens statements, comments on things you both see, and confirms details.
ashita yasumi da ne
So we're off tomorrow, huh.
明日休みだね
ashita wa yasumi desu ne
So tomorrow's a day off, then.
明日は休みですね
A drawn-out nee at the start of a sentence means hey. Mid-sentence ne (ano ne, kinou ne...) just holds the listener's attention. Don't add ne to facts only you know, such as your name or your plans; yo or nothing fits there.
yo
polite desu yo / -masu yoyou know (new info for you)
よ ですよ/〜ますよ
Marks something the listener doesn't know or needs reminding of, such as news, warnings, corrections or recommendations. Without it, a statement can sound flat.
ashita yasumi da yo
Tomorrow's a day off, you know.
明日休みだよ
ashita wa yasumi desu yo
Tomorrow's a day off, you know.
明日は休みですよ
When correcting a superior, yo can sound like lecturing.
yo ne
polite desu yo neright? (we both know)
よね ですよね
Checks that the listener shares something you believe, either to confirm it or to agree emphatically (sou da yo ne).
ashita yasumi da yo ne?
Tomorrow's a day off, right?
明日休みだよね?
ashita wa yasumi desu yo ne?
Tomorrow's a day off, right?
明日は休みですよね?
The order is fixed: always yo ne, never *ne yo.
Learn alongside: da, ka, ne, yo, yo na (Stage 4)Learn first: yo, ne