Syntax: This uses a simple declarative sentence structure ('Half of my heart is in Havana') to state a fact. The phrase 'ooh na-na' is a non-lexical vocable, common in pop music, that adds rhythmic and emotional texture without specific meaning. The clause 'He took me back to East Atlanta' uses the simple past tense to describe a completed action.
Morphology: 'Half' is a noun here, meaning one of two equal parts. 'Is' is the third-person singular present tense of the verb 'to be,' indicating a current state. 'Took' is the irregular past tense form of the verb 'take.' 'Na-na-na' demonstrates reduplication, a morphological process where a syllable is repeated for stylistic effect.

Syntax: The segment uses negation ('He didn't walk up with...') to contrast expected behavior with reality. The direct speech ('He said there's a lot of girls I can do with / But I can't without you') is introduced with 'He said.' The contraction 'there's' is used for 'there is.'
Morphology: 'Walk up' is a phrasal verb. 'How you doin'?' is a colloquial, contracted form of 'How are you doing?' The modal verb 'can' expresses ability or possibility. 'Without' is a preposition indicating absence.

Syntax: 'I knew him forever in a minute' is a figurative sentence where the object of the verb 'knew' is the duration 'forever,' modified by the prepositional phrase 'in a minute.' 'Papa says he got malo in him' uses informal, conversational grammar ('he got' for 'he has') and incorporates the Spanish word 'malo' (bad).
Morphology: 'Knew' is the irregular past tense of 'know.' 'Forever' is a compound adverb. 'In him' uses the preposition 'in' metaphorically to mean 'as part of his character.'

Syntax: The verse employs heavy ellipsis and informal syntax common in rap. 'Fresh on campus, mmm' omits a verb like 'is.' 'Bump on her bumper like a traffic jam' is a simile structured with 'like.' 'I was quick to pay that girl like Uncle Sam' is another simile comparing prompt payment to the U.S. government's taxation.
Morphology: 'Fresh' is used as an adjective meaning new or stylish. 'Mmm' is an interjection expressing satisfaction. 'Bump' is used as a verb. 'Shawty' is African-American Vernacular English (AAVE) slang for a young woman. 'Cravin'' and 'eatin'' use the apostrophe to indicate the dropping of the 'g' in present participles, representing informal speech.

Syntax: Uses interrogative sentences ('That's it?', 'You end up alone?') to express disbelief. The imperative sentence 'go write your own' is a command. The conditional clause 'if you don't like my story' sets up the condition for the command.
Morphology: 'That's' is a contraction of 'that is.' 'End up' is a phrasal verb. 'Don't' is the contraction of 'do not.' 'Your own' uses the possessive pronoun 'your' and the adjective 'own' for emphasis.