Syntax: The structure uses simple past tense ('gave') to describe completed actions in the past ('Last Christmas'). 'The very next day' is an adverbial phrase emphasizing the immediacy of the betrayal. The pronoun 'it' refers back to 'my heart,' creating cohesion.
Morphology: 'Gave' is the irregular past simple form of 'give.' 'My' is a possessive adjective modifying 'heart.' 'Away' is an adverb particle used with the verb 'gave' to form a phrasal verb meaning 'to discard' or 'give to someone else.'

Syntax: This is a complex sentence with an infinitive clause of purpose ('to save me from tears') at the beginning. The main clause uses the future tense with 'will' contracted to "I'll" ('I'll give it'). 'Someone special' is a noun phrase where the adjective 'special' post-modifies the indefinite pronoun 'someone.'
Morphology: 'To save' is the infinitive form. 'Me' is the object pronoun. 'Tears' is a plural countable noun. 'I'll' is a contraction of 'I will.' 'Someone' is an indefinite pronoun. 'Special' is an adjective.

Syntax: Line 13 is an idiom structured as a coordinated phrase: 'Once bitten' (past participle clause) 'and' (coordinating conjunction) 'twice shy' (adjective phrase). Line 14 is a compound sentence with two independent clauses joined by the conjunction 'but,' showing contrast between intention ('I keep my distance') and reality ('you still catch my eye').
Morphology: 'Bitten' is the past participle of the irregular verb 'bite.' 'Shy' is an adjective. 'Keep' is a present simple verb. 'My' is a possessive adjective. 'Catch' is a present simple verb. 'My' is a possessive adjective.

Syntax: These are two simple sentences. The first uses past simple verbs ('wrapped,' 'sent'). The second sentence contains reported speech introduced by 'saying,' with the direct quote "I love you" embedded. 'I meant it' is a short clause confirming the sincerity of the previous statement.
Morphology: 'Wrapped' is the regular past simple of 'wrap.' 'Up' is an adverb particle. 'Sent' is the irregular past simple of 'send.' 'Saying' is the present participle/gerund. 'Meant' is the irregular past simple of 'mean.'

Syntax: Line 36 is an exclamatory structure ('My God') followed by a past thought ('I thought you were...'). 'Someone to rely on' is a noun phrase with an infinitive clause post-modifier. Line 37 starts with the object pronoun 'Me?' for emphasis, followed by a statement where 'a shoulder to cry on' is a metaphorical noun phrase, also with an infinitive post-modifier.
Morphology: 'Thought' is the irregular past simple of 'think.' 'Were' is the past simple of 'be.' 'To rely' is an infinitive. 'Guess' is a present simple verb. 'Was' is the past simple of 'be.' 'To cry' is an infinitive.