Expression dictionary — full article
Reasons & Causes · in case (something happens), for fear that, worried that, concerned that
(으)ㄹ까 봐 is a versatile grammar pattern used to express that the speaker is concerned or worried about a potential future event or situation, and as a result, they have taken a specific action or are experiencing a particular feeling. It essentially means "because I was worried that..." or "in case..."
This expression is attached to the stem of a verb or adjective to indicate the reason or motivation behind an action or state, which is rooted in a concern or fear of a hypothetical negative outcome. The clause preceding (으)ㄹ까 봐 describes the feared possibility, while the following clause describes the action taken to prevent it, or the feeling resulting from that fear. It's commonly used when explaining a preventative measure or a precautionary action.
For example, if you are worried it might rain, you bring an umbrella. The reason for bringing the umbrella is the worry about rain. This pattern perfectly captures that cause-and-effect relationship driven by apprehension.
The conjugation of (으)ㄹ까 봐 depends on whether the verb or adjective stem ends in a consonant or a vowel.
If the verb/adjective stem ends in a consonant (excluding ㄹ): Add -을까 봐.
If the verb/adjective stem ends in a vowel or the consonant ㄹ: Add -ㄹ까 봐.