Please describe the difference between ichidan and godan verbs
Sure, I'd be happy to explain the difference between ichidan and godan verbs in Japanese.
Ichidan verbs, otherwise known as "ru" verbs, are a type of verb that end in the hiragana character る (ru). They are called ichidan verbs because, in their dictionary form, they have only one stem or root. For example, the verb 食べる (taberu) which means "to eat" is an ichidan verb because it ends in the character る (ru) and has only one stem "tabe-".
Godan verbs, otherwise known as "u" verbs, are a type of verb that end in any of the hiragana characters う (u), く (ku), す (su), つ (tsu), ぬ (nu), ぶ (bu), or む (mu). Thus, they are called godan verbs because they have five stems, one for each of the Japanese vowels (also called "vowel modifications" or "vowel changes"). For example, the verb 遊ぶ (asobu), which means "to play," is a godan verb because it doesn't end in る (ru) and has five stems: asob-(う), asob-(か), asob-(さ), asob-(た), and asob-(は).
The biggest difference between these two types of verbs is their conjugation pattern. Ichidan verbs follow a simple and regular conjugation pattern, where the る (ru) ending is simply dropped and replaced with other endings. For example, to make the past tense of 食べる (taberu), you simply drop the る (ru) and add た (ta), giving you 食べた (tabeta), which means "ate".
Godan verbs, on the other hand, have a more complex conjugation pattern because they have five different stems. The way you conjugate depends on which stem you're using (depending on the tense, politeness level, etc), which can make it more confusing to learn. However, once you understand the general pattern, godan verbs can become easier to use.
Overall, knowing whether a verb is an ichidan or godan verb helps you understand how to conjugate the verb in different tenses, forms, and levels of politeness.