As mentioned in Japanese Journey 六, there are two types of adjectives in Japanese language: い-adjective and な-adjective. The example in adjective conjugation, 高い, is an い-adjective.
All い-adjectives end with い. Some of the “famous” い-adjectives that you may hear from Japanese drama series are 可愛い (cute)、優しい (gentle)、美味しい (delicious) and 素晴らしい (fabulous).
To describe a noun, you just need to add the noun after the い-adjective, for examples, 可愛い子供、優しい人、美味しい寿司。
Although some な-adjectives end with い, you add な in between the adjective and the noun to describe the noun. Are な-adjectives confusing? No. From the examples below, although the pronunciation ends with い, they are kanji that does not end with い alone like い-adjectives. It takes a lot of learning to differentiate な-adjectives from い-adjectives, but it is not confusing.
Examples of な-adjective and its usage:
(a) 綺麗 (きれい) — 綺麗な女の子
(b) 有名 (ゆうめい) — 有名な人
Asking questions in Japanese is easy. Once you have learnt sufficient grammar and vocabulary to form sentences, you just need to add か (ka) at the end of the sentence to make it a question sentence. Let’s look at two examples:
(a) 高いですか？— Is it expensive?
(b) あなたは行きますか？— Are you going?
1. Start a diary to write in the language that you are learning. The more you use the language in your daily life, the more your brain can retain what you have learnt.