Translation of "Interjection" in Japanese

"Ah" is an interjection.

「ああ」は感嘆詞だ。

"Ah!" is an interjection.

「ああ！」は感嘆詞だ。

In English there are eight main parts of speech: noun, verb, adjective, adverb, pronoun, preposition, conjunction and finally interjection.

英語には８つの主な品詞があります：　名詞、動詞、形容詞、副詞、代名詞、前置詞、接続詞そして感嘆詞。