나가면

나가면

"If (someone) goes out" or "when (someone) goes out."

Here, '나가면' implies a hypothetical condition referring to the cat potentially 'going out'.

문을 열면 고양이가 나가면 안 돼요.

When you open the door, the cat must not go out.

In this context, '나가면' represents a habitual condition meaning 'if (you) go outside'.

밖에 자주 나가면 건강에 좋아요.

If you go outside often, it's good for your health.

In this sentence, '나가면' illustrates a conditional clause and means 'if (you) go out'.

비가 올 것 같으니 나가면 안 돼요.

It seems it might rain, so you shouldn't go out.