Μία φορά, πέρασε η μισή χρονιά και

Μία φορά, πέρασε η μισή χρονιά και ο καθηγητής περίμενε να φέρω το βιβλίο στο δικό του μάθημα

Results (English) 1:

Once, he spent half the year and the professor waited to bring the book to his own course

Results (English) 2:

One time, half the year went by and the professor waited for me to bring the book to his class.

Results (English) 3:

Once, half a year passed and the professor waited for me to bring the book to his class.