Coordination and subordination are techniques to combine sentences, with coordination for equal ideas and subordination for unequal ideas.
Coordination joins two related ideas of equal importance, while subordination joins two related ideas of unequal importance. To form a compound sentence (coordination), combine sentences using coordinating conjunctions like 'and,' 'but,' or 'or.' For a complex sentence (subordination), link sentences using subordinating conjunctions such as 'although,' 'because,' or 'while.'
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