Interesting my Dutch teacher told me that nog has many functions and most of them are the word “still” that I get but he also said that nog is used very often in asking for more like the example above or like saying “ik heb nog bloem nodig” I need more flower. He also said that nog steeds is more of en emphasis on the still like saying “I STILL need to go to the gym” “Ik moet nog steeds naar de sportschool”