Final answer:
The sentence contains one adjective clause 'that took so long to build' introduced by the subordinate conjunction 'that,' and one adverb clause 'if not more' introduced by 'if'. These subordinate clauses modify the noun 'system' and the verb 'need', respectively.
Step-by-step explanation:
To correctly identify subordinate conjunctions and subordinate clauses in the given sentence, we must first understand their definitions. A subordinate conjunction is a word that introduces a dependent (subordinate) clause, and a subordinate clause is one that cannot stand alone as a complete sentence because it does not express a complete thought without being attached to an independent (main) clause.
In the sentence "A system that took so long to build will probably need as much time, if not more, to truly adapt to the free enterprise system,” the subordinate conjunction is "that,” which introduces an adjective clause describing "system." This clause is "A system that took so long to build" and is an adjective clause (AdjC) because it modifies the noun "system." There is also an adverb clause (AdvC) introduced by the conjunction 'if' in the phrase "if not more," which modifies the verb "need" by providing conditions under which the 'system' will need time to adapt.
Therefore, the sentence contains two subordinations: the adjective clause "that took so long to build" (AdjC) and the adverb clause "if not more" (AdvC).