How I distinguish verb conjugation groups

In this lesson, I will introduce you the typical way how we Japanese native speakers distinguish verb conjugation groups. You can tell whether a verb is a う-verb or a る-verb by conjugating the verb into negative plain forms, which is ない forms. If you can hear the vowel あ(a) before ない(nai), it is a う verb. If you can hear the vowel either え(e) or い(i) before ない(nai), it is a る verb. <Examples of う verbs> Dictionary Form: かく(kaku) Negative Plain Forms: かかない(kakanai)  Dictionary Form: はしる(hashiru) Negative Plain Forms: はしらない(hashiranai)  * When you can hear the vowel あ(a) before ない(nai), verb conjugation group will be う verb. <Examples of る verbs> Dictionary Form: たべる(taberu) Negative Plain Forms: たべない(tabenai)  Dictionary Form: みる(miru) Negative Plain Forms: みない(minai)  *When you can hear the vowel either え(e) or い(i)before ない(nai), verb conjugation group will be う verb. References: Verb Conjugation https://anchor.fm/yuya-sato/episodes/Verb-Conjugation-emv716 Present Tense Conjugation https://anchor.fm/yuya-sato/episodes/Present-Tense-Conjugation-en0a2r Instagram: https://www.instagram.com/yuyaman1986