hubieran nadado
-they/you had swum
Past perfect subjunctiveellos/ellas/ustedesconjugation ofnadar.

nadar

Si el vuelco del M o D no se hubiera detenido no quiero saber que habría pasado si hubieran nadado el rápido siguiente.
If the turn of the M or D had not stopped I do not know what would have happened if they had swum following the fast.
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