John 6:49

οἱ πατέρες ὑμῶν ἔφαγον ἐν τῇ ἐρήμῳ τὸ μάννα καὶ ἀπέθανον·

Rough Word-by-word:
The fathers of you all they ate in the wilderness the manna and they died.

Smooth Translation:
Your fathers ate the manna in the wilderness and they died.

οἱ definite article nominative plural masculine "the"

πατέρες noun nominative plural masculine "fathers"

ὑμῶν pronoun genitive plural masculine "of you"

ἔφαγον verb aorist active indicative 3rd plural from ἐσθίω (I eat) "they ate"

ἐν dative preposition "in"

τῇ definite article dative singular feminine "the"

ἐρήμῳ noun (or substantive adjective) dative singular feminine "wilderness, desert"

τὸ definite article accusative singular neuter "the"

μάννα noun accusative singular neuter "manna"

καὶ conjunction "and"

ἀπέθανον verb aorist active indicative 3rd plural from ἀποθνήσκω (I die) "they died"