だ
だ
auxiliary
is, am, are (plain copula)
1.
is, am, are (plain copula)
The plain/casual form of the copula, used to link a subject to a predicate noun or na-adjective. This is the informal equivalent of です.
だ is the plain copula in Japanese, used in casual speech and writing.
FORMS:
- だ (plain present/future)
- だった (plain past)
- ではない / じゃない (plain negative)
- ではなかった / じゃなかった (plain past negative)
POLITE EQUIVALENT:
- です (polite present)
- でした (polite past)
USAGE:
- Used at the end of sentences in casual/plain speech
- Follows nouns and な-adjectives
- With い-adjectives: だ is NOT used (say 高い, not ×高いだ)
- Often omitted in casual speech, especially by women and in questions