We don’t talk much about ellipsis in first year Greek, but it is a grammatical fact that occurs more than you might think.
An ellipsis is when words are left out, and the assumption is that the context is sufficient to fill in the gaps. It especially happens in the second of two parallel thoughts, words from the first assumed in the second.
But John 12:7 gives us a good example of ellipsis when there is no parallel. Mary anoints Jesus’ feet, Judas objects, and Jesus responds, “Leave her alone…. It was intended that she should save this perfume for the day of my burial” (NIV). ἄφες αὐτήν, ἵνα εἰς τὴν ἡμέραν τοῦ ἐνταφιασμοῦ μου τηρήσῃ αὐτό. In other words, the words “It was intended” is the NIV’s guess as to what “should” have been before the ἵνα.