أَعْجَبَنِي حُضُورُكَ وَتُسَاعِدَ زُمَلَاءَكَ.
Your attendance and your helping your classmates pleased me. Ḥuḍūruka is an explicit noun; wa + tu-sāʿida is interpreted as a verbal noun by understood an, coordinating with it.
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Category 7: Coordinating with a Noun
The Subjunctive Imperfect and Its Governors
أَعْجَبَنِي حُضُورُكَ وَتُسَاعِدَ زُمَلَاءَكَ.
Your attendance and your helping your classmates pleased me. Ḥuḍūruka is an explicit noun; wa + tu-sāʿida is interpreted as a verbal noun by understood an, coordinating with it.