وَقَفْتُ احْتِرَامًا لِلْمُعَلِّمِ
Translation: I stood out of respect for the teacher.
وَقَفْتُ: past verb with first-person subject.
احْتِرَامًا: accusative purpose/reason complement.
لِلْمُعَلِّمِ: prepositional phrase specifying who is respected.
Iḥtirāman supplies the motivation for standing, rather than being the cognate verbal noun of waqafa.