Not 'no' — 'still on the way'

Where the picture shows up in 아직

1. 1

   before the arrival point

   아직 안 왔어요.

   a-jik an wa-sseo-yo

   He isn't here yet.

   안 왔어요 is bare fact; 아직 안 왔어요 carries the expectation that he will.

2. 2

   before the ending point

   아직 시간 있어요.

   a-jik si-gan i-sseo-yo

   There's still time.

   It works on the positive side too — it isn't only for negatives.

3. 3

   before the point of being good at it

   저는 아직 잘 못해요.

   jeo-neun a-jik jal mo-tae-yo

   I'm still not very good.

   Unlike a flat 못해요, it implies you're on your way there.

4. 4

   before the deciding point

   아직 안 정했어요.

   a-jik an jeong-hae-sseo-yo

   I haven't decided yet.

5. 5

   still going, longer than expected

   그 식당 아직도 있어요?

   geu sik-dang a-jik-do i-sseo-yo

   Is that restaurant still around?

   아직도 adds surprise that it has lasted this long.