The subject and predicate in a sentence identify who or what the sentence is about and what the subject is doing or has done.
The subject of a sentence is the part that names who or what the sentence is about. The predicate is the part that tells us something about the subject, usually what the subject is doing or has done. In the sentence: 'The boy stood on the last bench.', 'boy' is the subject, and 'stood on the last bench' is the predicate.
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