An absolute phrase has a subject, but not an action verb, so it cannot stand alone as a complete sentence. It modifies the whole sentence, not just a noun. Examples are: His tail between his legs, the dog walked out the door.; Picnic basket in hand, she set off for her date.; The guys attacked the pile of nachos, their fingers getting the last bit of cheese off the plate.

Subject-verb agreement means that the sentence is grammatically correct. Subject-verb agreement is usually more of a problem in present-tense sentences.Verbs in the past tense don't change as much when the number of the subjects change ("He walked" is the same verb form as "They walked," for example).

La Furia y los Leones del Atlas no lograron superarse en 120 minutos de fútbol y tendrán que jugarse el pase a cuartos desde los once pasos.