A quiet student is waiting.
Verb: is waiting → who? A quiet student → complete subject: A quiet student → A introduces one unidentified singular count person → stands alone: yes
Put It Together
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For every row: complete verb → who/what? → complete subject → article/reference → stand-alone check.
Verb: is waiting → who? A quiet student → complete subject: A quiet student → A introduces one unidentified singular count person → stands alone: yes
Verb: is waiting → who? The quiet student → complete subject: The quiet student → The identifies the student from context → stands alone: yes
Complete verb: missing → who/what? the noun phrase only → complete subject: The quiet student near the windows → The marks an identifiable student → stands alone: no—fragment
Verb: is → who? An honest guide → complete subject: An honest guide → An follows the vowel sound in honest → stands alone: yes
Verb: are → who? Guides → complete subject: Guides → no article for a plural category in general → stands alone: yes
Verb: are → who? the guides → complete subject: the guides → The identifies the group → stands alone: no—because makes it dependent
SOLO → LABEL → JUSTIFY → CHECK · Identifica las partes