All languages have irregular verbs, Korean is no exception. Fortunately, though, Korean irregular verbs are nothing you need fear like the French irregular verbs. While you still need to memorize a few rules, the amount is very manageable.
Korean irregular verbs can be divided into 7 major groups of verb types. The 7 Korean irregular verb groups are:
- ㅡ Irregular Verbs
- ㄹ Irregular Verbs
- 르 Irregular Verbs
- ㅂ Irregular Verbs
- ㄷ Irregular Verbs
- ㅎ Irregular Verbs
- ㅅ Irregular Verbs
Each group comes with its own set of rules you will have to memorize. But, since 99% of all these verbs adhere to one of those seven rulesets, it is hardly an insurmountable task. It is important you master these rules because like in any language these verbs are quite commonly used.
Of course, as mentioned there are still a few exceptionally irregular verbs out there. However, those verbs are few in number and a few are considered and taught as ‘standard’/regular nowadays, think 하다 (technically 여 irregular). However, other verbs still deviate from the norm, like 푸다 (to scoop, to ladle) for example. For those cases, you will have to memorize its unique rule. Luckily, the rules are never overly complicated.
All in all Korean irregular verbs are simple to learn as you only need to learn a few conditions and rules to use them properly. A beginner is strongly urged to learn these sets of rules gradually, but as early as possible. These verbs are so common, you cannot avoid using them without your language sounding unnatural.