"학생은 아침에 일어난다."
Translation:The student gets up in the morning.
In the formal non-polite, non-past indicative verb form, if the root ends in a vowel, just append -ㄴ다. For roots that end in a consonant, append -는다. For verb roots ending in -ㄹ, the -ㄹ is deleted and -ㄴ다 is appended as if the root ended in a vowel. In many cases when a decision has to be made regarding whether a root ends in a consonant or a vowel, the ㄹ has the qualities of a weak vowel.