In the sentence "The red house down the street is beautiful":
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"down the street":
- Grammatical Name: Prepositional Phrase
- Function: Adjectival Modifier (it modifies "the red house" by providing additional information about its location).
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"beautiful":
- Grammatical Name: Adjective
- Function: Predicative Adjective (it describes the subject "the red house" and is linked to it by the verb "is").