اعرب كي تجعلهم رجالاً نافعين

“كي” is a present tense particle that is not declinable. “تجعلهم” is a present verb with a subject pronoun that is in the accusative case with a fatha, and the object pronoun is also in the accusative case with a fatha, while the hidden subject pronoun is “هي”. “رجالا” is the second object in the accusative case with a fatha. “نافعين” is an adverb in the accusative case with a fatha.