be, is
Noun / Adjective +
Noun +
When used with a noun, it simply states that 'A is B' in a formal, written style.
彼は医者
He is a doctor.
これは事実
This is a fact.
な-Adjective stem +
When used with な-Adjectives, the dictionary form of the adjective (the stem without 'な') is followed by
この場所は静か
This place is quiet.
健康は大切
Health is important.
While