Syntax: This segment uses the present continuous tense 'looking back' to describe an ongoing reflection, followed by a conditional structure 'if you wanna be my lover' that presents a hypothetical situation. 'Oughta' is a contraction of 'ought to', which functions as a modal verb expressing expectation or advisability.
Morphology: 'Looking back' uses the -ing participle form of the verb 'look' to create a present participle phrase. 'Oughta' demonstrates colloquial contraction morphology where 'ought to' becomes 'oughta' through phonetic reduction. 'Wanna' shows informal morphological contraction of 'want to'.

Syntax: This segment uses imperative mood ('go ahead and take your time') to give advice, followed by a temporal clause structure ('before I make you mine') that establishes a condition. The structure 'you have to be sure' uses the modal verb 'have to' to express necessity.
Morphology: 'Gotta' is a colloquial contraction of 'got to' or 'have got to', showing informal morphological reduction. 'Make you mine' uses the base form 'make' as the main verb in an imperative-like construction. 'Have to' functions as a semi-modal verb expressing obligation.

Syntax: This segment begins with a discourse marker 'I must confess' that introduces a personal revelation, followed by a declarative statement 'I wanna be your lover'. The comparative structure 'like no other' uses 'like' as a preposition to establish similarity.
Morphology: 'Wanna' again shows contraction of 'want to'. 'Getting down' uses the -ing participle form of the phrasal verb 'get down'. 'No other' uses the determiner 'no' with the pronoun 'other' to create a negative comparative expression.

Syntax: This segment uses a metaphorical comparison with 'the key' as a predicate nominative, followed by a simile introduced by 'like' that compares the singer's posture to that of someone proposing marriage. 'On bended knee' is a prepositional phrase describing physical position.
Morphology: 'Definitely' is an adverb formed with the -ly suffix added to the adjective 'definite'. 'Bended' is an archaic or poetic form of 'bent', showing irregular past participle morphology. 'Knee' is a singular noun in this fixed expression.

Syntax: This segment uses parallel structure with 'I hear', 'I see', 'I know' to emphasize comprehensive understanding. The relative clause 'that it's telling me' introduces reported information. 'Everything I need to know' uses an embedded relative clause structure.
Morphology: 'Telling' uses the -ing participle form to create a present continuous construction. 'Need to' functions as a semi-modal expression of necessity. 'Everything' is a compound pronoun formed from 'every' + 'thing'.