Hello, I am Yoshi from NILS Japanese language school. We start a new lesson today. You will start learning adjectives in Lesson 8.
[Adjectives]
Ajectives are used as 1) predeictes and 2) noun modifiers. They inflect and are divided into two groups, い-adjectives ad な-adjectives, according to the inflection.

[Nは　な-adj (without な）　です／Nは　い-adj　です]
1) です at the end of an adjective snetence shows the speaker’s polite attitude toward the listner. An い-adjective with い at the end comes before です, whereas a な-adjective without な comes before です.
(Example)
ワット先生（せんせい）は　親切（しんせつ）です。　　　Mr. Watt is kind.
富士山（ふじさん）は　高（たか）いです。　　　Mt. Fuji is high.
*親切[な]：　kind
*高い：　high, tall
です is used when a sentence is non-past and affirmative.

2) な-adj (without な) じゃ　ありません
The negative form of な-adj (without な) です　is な-adj (without な) じゃ　ありません.
(Example)
ここは　静（しず）かじゃ　ありません。　　　It’s not quiet here.
*静か[な]：　quiet

3) い-adj (without い at the end) くないです
To make the negative form of an い-adjective, い at the end of the い-adjective is altered to くない.
(Example)
この本（ほん）は　おもしろくないです。　　　This book is not interesting.
*おもしろい：　interesting
The negativei form for いいです is よくないです.
*いい[よい]：　good, nice

4) Questions using adjective sentences are made in the same way as those using noun or verb sentences. In answering a question, you repeat the adjective used in teh question. そうです or そうじゃ　ありません cannot be used.

July 13th News, from NILS Japanese language school.