if (someone) is hereThe conditional form of ここにいる, meaning “to be here.” Depending on context, it can also mean “if (someone) stays here.” With のに, it often expresses a wish or regret, such as “if only they were here.”
JA: あなたがここにいれば、もっと安心できる。
EN: If you were here, I would feel much more at ease.