です
(Desu)
is / am / are (polite copula).
Connection rules
- ＋Noun or na-adjective + です
- ＋Often follows い-adjectives (e.g., 高いです) as a politeness marker, even though it is not formally copular in that use.
- ＋The plain-form equivalent is だ. In feminine plain speech だ is often dropped entirely.
Examples
1.
これは本です。
Kore wa hon desu.
This is a book.
「is / am / are (polite copula)」
2.
田中さんは先生です。
Tanaka san wa sensei desu.
Mr. Tanaka is a teacher.
「is / am / are (polite copula)」