Verb root is the stem of verbs after removing 다 from dictionary form. 1) If the verb root ends with ㅏvowel, ㅗ vowels, it becomes ‘ㅏ요’. 2) If the verb root ends with 하 syllable, it becomes ‘해요’. 3) If the verb ends with the rest of vowels, it becomes ‘어요’.
1) If it ends with ㅣvowel, it becomes ‘ㅕ요’. 2) If it ends with ㅡ vowel, get rid of ㅡ and add ‘ㅓ요’. 3) If it (only applying to some verbs) ends with ㅂ consonant, make new verb root by getting rid of ㅂ and add ‘우’, then ‘어요’ (which becomes ‘워요’)
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