In a nominative–accusative system, S and A are grouped together, contrasting O. In an ergative–absolutive system, S and O are one group and contrast with A. The English language represents a typical nominative–accusative system ("accusative" for short). The name derived from the nominative and accusative cases. Basque is an ergative–absolutive system (or simply "absolutive"). The name stemmed from the ergative and absolutive cases. S is said to align with either A (as in English) or O (as in Basque) when they take the same form.