The Odyssey by Homer - Parsing the Greek - Line 1 Book 1 - "Sing to me, Muse..."

ἄνδρα μοι ἔννεπε, μοῦσα, πολύτροπον, ὃς μάλα πολλὰ πλάγχθη, ἐπεὶ Τροίης ἱερὸν πτολίεθρον ἔπερσεν:

Sing to me, Muse, of the man, many turned, who very many places was driven, after he sacked the sacred citadel of Troy. 

ἄνδρα - third declension noun - acc, sing

Case	Singular	Plural
Nominative	ἀνήρ	ἄνδρες
Genitive	ἀνδρός	ἀνδρῶν
Dative	ἀνδρί	ἀνδράσι(ν)
Accusative	ἄνδρα	ἄνδρας
Vocative	ἄνερ	ἄνδρες

μοι - first person pronoun - dative singular - "to me" 

ἔννεπε - 2nd person present active imperative from ἔννεπω (to tell, narrate, or declare)

μοῦσα - 1st declension noun, vocative singular

Case	Singular	Plural
Nominative	Μοῦσα	Μοῦσαι
Genitive	Μούσης	Μουσῶν
Dative	Μούσῃ	Μούσαις
Accusative	Μοῦσαν	Μούσας
Vocative	Μοῦσα	Μοῦσαι

πολύτροπον - polus + tropos - 2nd declension acc, sing, masc - "many turns" 

Case	Singular (M/F)	Singular (Neuter)	Plural (M/F)	Plural (Neuter)
Nominative	πολύτροπος	πολύτροπον	πολύτροποι	πολύτροπα
Genitive	πολυτρόπου	πολυτρόπου	πολυτρόπων	πολυτρόπων
Dative	πολυτρόπῳ	πολυτρόπῳ	πολυτρόποις	πολυτρόποις
Accusative	πολύτροπον	πολύτροπον	πολυτρόπους	πολύτροπα
Vocative	πολύτροπε	πολύτροπον	πολύτροποι	πολύτροπα

ὃς - relative pronoun - nom, sing, - "who" 

μάλα - adverb - "very, exceedingly, quite" - this word intensifies an adj, adv, or verb - here intensifying " πολλὰ" 

 πολλὰ - neuter, acc, plural adj - "much, many" used as a substantive for "many places" 

Case	Singular (M/F)	Singular (Neuter)	Plural (M/F)	Plural (Neuter)
Nominative	πολύς	πολύ	πολλοί	πολλά
Genitive	πολλοῦ	πολλοῦ	πολλῶν	πολλῶν
Dative	πολλῷ	πολλῷ	πολλοῖς	πολλοῖς
Accusative	πολύν	πολύ	πολλούς	πολλά
Vocative	πολύ	πολύ	πολλοί	πολλά

πλάγχθη - from πλαζω "to drive, strike, cause to wonder" - 3rd person singular aorist passive indicative - "was driven" 

ἐπεὶ - conjunction - when, since, after, because 

Τροίης - 1st dec fem mixed eta - genitive singular - "of Troy"

Case	Singular	Plural
Nominative	Τροία	Τροῖαι
Genitive	Τροίης	Τροιῶν
Dative	Τροίῃ	Τροίαις
Accusative	Τροίαν	Τροίας
Vocative	Τροία	Τροῖαι

ἱερὸν - neuter, accusative singular - "holy, sacred" 

Case	Singular (M/F)	Singular (Neuter)	Plural (M/F)	Plural (Neuter)
Nominative	ἱερός	ἱερόν	ἱεροί	ἱερά
Genitive	ἱεροῦ	ἱεροῦ	ἱερῶν	ἱερῶν
Dative	ἱερῷ	ἱερῷ	ἱεροῖς	ἱεροῖς
Accusative	ἱερόν	ἱερόν	ἱερούς	ἱερά
Vocative	ἱερέ	ἱερόν	ἱεροί	ἱερά

πτολίεθρον - Neuter 3rd declension - accusative singular - "city, citadel" 

Case	Singular	Plural
Nominative	πτολίεθρον	πτολιέθρα
Genitive	πτολιέθρου	πτολιέθρων
Dative	πτολιέθρῳ	πτολιέθροις
Accusative	πτολίεθρον	πτολιέθρα
Vocative	πτολίεθρον	πτολιέθρα

ἔπερσεν - from "περθω" - "to sack, destroy, or lay waste" - 3rd person singular aorist active indicative - "he sacked"