مَالِ هَذَا الرَّسُولِ يَأْكُلُ الطَّعَامَ وَيَمْشِي فِي الْأَسْوَاقِ
What is with this messenger, that he eats food and walks in the markets? (al-Furqān 25:7)
The opponents' words convey astonishment (taʿajjub) at the messenger's ordinary human activities.
فَأَيْنَ تَذْهَبُونَ
So where are you going? (al-Takwīr 81:26)
This question serves admonition against misguidance. It does not ask for a physical destination; it exposes the wrongness of the addressees' direction.
أَتَفْعَلُ كَذَا وَقَدْ أَحْسَنْتُ إِلَيْكَ؟
Will you do this despite the kindness I have shown you?
Said with the implication of consequences or punishment, it expresses warning or threat (waʿīd). In all these uses, one must distinguish the interrogative form, the intended force, and its contextual evidence. The next topic is tamannī.