Form-function diagram of 'You wander the world with a vision of what life could be.' The sentence contains the noun clause 'what life could be' that functions as a prepositional complement (object of the preposition) of 'of.' The complementizer 'what' functions as the direct object of the noun clause. The sentence also contains two adjunct adverbials: the noun phrase 'the world' and the prepositional phrase 'with a vision of what life can be.'
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