If1 When or if ? Conjunctions, when & if 1. when or if To talk about situations or conditions that are facts, repeated, or predictable, we can use either IF or WHEN. [ if/when + simple present tense verb form ] If/When I go home, I have dinner. You can get a driver's license if/when you’re 18. 2. if We use if for unknown, unreal, or possible situations or conditions. If it snows this year, I'll go skiin.. 2020. 7. 11. 댓글