One source of confusion is words that look very similar, e.g. εἰ and εἶ in εἰ σὺ οὐκ εἶ ὁ Χριστὸς. So I generated a list of these "minimal pairs", words that differ only by accent that are found in the upcoming chapter. Micheal Palmer and I discussed this, and I will be asking students to read through these verses and use a pencil to mark which of the two words is being used each time that one of them pops up in the examples.
Example:
Complete list for John 1 attached.εἶ εἰ ( εἰμί εἰ )
John.1.21.13 Ὁ προφήτης εἶ σύ;
John.1.25.10 εἰ σὺ οὐκ εἶ ὁ Χριστὸς οὐδὲ Ἠλείας οὐδὲ ὁ προφήτης;
John.1.25.11 σὺ οὐκ εἶ ὁ Χριστὸς οὐδὲ Ἠλείας οὐδὲ ὁ προφήτης;
John.1.42.11 Σὺ εἶ Σίμων ὁ υἱὸς Ἰωάνου,
John.1.49.5 σὺ εἶ ὁ Υἱὸς τοῦ Θεοῦ,
John.1.49.11 σὺ Βασιλεὺς τοῦ Ἰσραήλ εἶ