Declaring the State of Being

Vocabulary

1. 学生 【がく・せい】 – student
2. 元気 【げん・き】 (na-adj) – healthy, energetic
3. 日本人 【に・ほん・じん】 – Japanese person
4. 先生 【せん・せい】 – teacher
5. 友達 【とも・だち】 – friend

In Japanese, the most basic sentence structure involves declaring what something is. This is often done using だ or です.

The Copula だ

The word だ acts like the English verb “to be” (is, am, are), but strictly speaking, it declares the state of existence.

Example

Person A: Are you a student?
Person B: 学生だ。 - I am a student.

Note that Japanese often omits the subject (like “I” or “You”) when it is understood from context.

The Polite Form です

です is the polite version of だ. It is used when speaking to strangers, superiors, or in formal situations.

Example

学生です。 - I am a student.

More Examples

日本人だ。 - I am Japanese.
先生です。 - I am a teacher. (polite)
友達だ。 - He/She is a friend.

Comparisons

Casual (Plain)	Polite	Meaning
学生だ	学生です	(I) am a student.
元気だ	元気です	(I) am well/healthy.
日本人だ	日本人です	(I) am Japanese.