Korean speakers often struggle with distinguishing between the "v" and "b" sounds in English because the Korean language does not have a distinct "v" sound. This can lead to mispronunciations when speaking English. Here are some key reasons and patterns:

1. Absence of the "v" sound in Korean:

2. Phonetic similarity:

3. Mispronunciation patterns:

4. Influence of Romanization:

5. Lack of exposure or practice:

How to improve:

In summary, the tendency to mispronounce "v" and "b" stems from the absence of the "v" sound in Korean and the phonetic overlap between the two sounds. With practice and awareness, this challenge can be overcome.