Final answer:
The complete adjective clause in the sentence 'The car I just bought needs all kinds of repairs.' is 'I just bought.' It modifies the noun 'car' by providing more information about it.
Step-by-step explanation:
The sentence in question is "The car I just bought needs all kinds of repairs." To identify the complete adjective clause, we need to find the part of the sentence that modifies the noun car and contains both a subject and a verb. The adjective clause in this sentence is "I just bought", as it modifies the noun car by telling us which car the speaker is referring to. This clause contains the subject I and the verb bought. In English grammar, adjective clauses function to provide additional information about the noun they modify, similar to how stand-alone adjectives or adjective phrases function. The noun car is being described by telling us about an action that took place involving that car, namely that it was recently purchased by the speaker.