اعراب يبنى المجد بإخلاص الشباب

The sentence “يبني المجد بإخلاص الشباب” can be analyzed as follows: “يبني” is a present tense verb, “المجد” is the direct object, “بإخلاص” is a prepositional phrase with “ب” as a preposition, and “الشباب” is the subject. The verb is in the third person singular form. The sentence means “He builds glory with the sincerity of the youth.” The verb and the subject are both in their nominative forms, while the direct object and the prepositional phrase are in their accusative and genitive forms respectively.