V + (으)면
When we want to say a conditional sentence in Korean, a sentence that carries the meaning ‘if’, then we have to conjugate the Korean verb that we are using ‘if’ with, by replacing the ‘다’ stem with (으)면.
1. If the verb ends in a consonant, then we replace the verb stem with 으면.
2. If the verb ends in a vowel, then we replace the verb stem with 면.
3. To emphasize the ‘if’ meaning, we can add the word ‘만약에’ at the beginning of the sentence.
4. Like in English, we should say something after, because we said ‘if’ so we also need to explain what happens.
내일 비가 오면 안 갈거예요! = If it rains tomorrow, I won’t go!
만약 너가 있으면 참가할거예요. = If you are there, I will participate.