Stems ending with dental

ἐλπις + - αἱ ἐλπιδ + ες  
της ἐλπιδ + ος των ἐλπιδ + ων  
τῃ ἐλπιδ + ι ταις ἐλπις + ι(ν)  
την ἐλπιδ + α τας ἐλπιδ + ας