Passive voice, Passive form
This expression is used when the subject's action or behavior occurs either because of an action performed by someone else or because of some other indirect action performed by some person or thing. It is made by attaching -이/히/리/기- to the verb stem. Note that only some verbs allow this affix.
The most common passive verbs are as follows.
These single word passive expressions are used in the following forms. The original action form is shown on the right, and this is changed to the passive form on the left.
2 more sentences in the app — free account.