"My mother is a secretary."
Translation:Η μητέρα μου είναι γραμματέας.
I'm confused about the ending of γραμματέας. Is it unusual for a feminine noun to end in -ας? How do the declensions work for this ending in accusative? Πιγαινω στην γραμματέα?
Female nouns don't end just in -η or -α. It's just the most common of female endings. Female nouns ending in -ας (like γραμματέας), or -ος (like έξοδος, είσοδος) are way fewer and less common than the ones ending in -η or -α.
And yes. Female nouns ending in -ας do form the accusative in -α. ^.^