La nòble frènte al yùgo vìl.
Only the accent on the eighth syllable is necessary; e.g., Iriarte:
Tú, manguito, en invierno sìrves,
En verano vas á un rincón.
But in songs the fourth syllable should also be stressed.
The seven-syllabled iambic (the heptasyllabic or anacreontic verse) has a necessary accent on the sixth syllable; Villegas:
Quiero cantar de Càdmo.
The perfect type is seen in Villegas:
Las cuèrdas mùdo aprìsa.
In songs the fourth syllable is also stressed. Sometimes the anapæst supplants the iambic, e.g., Villegas: