〜です (desu)
To be (is/am/are)
Structure
Noun / Adjective + です
Explanation
Used at the end of a sentence to show politeness (formal form) and to state identity, state, or facts about the subject.
Examples
私は学生です。
Watashi wa gakusei desu.
I am a student.
今日はいい天気です。
Kyou wa ii tenki desu.
Today's weather is good.