Syntax: This is a complex sentence structure beginning with 'When' (subordinating conjunction) introducing a dependent adverbial clause of time ('When the visions around you bring tears to your eyes'). The main clause is implied but not stated in these lines. The second clause ('And all that surrounds you are secrets and lies') uses 'all that' as a subject meaning 'everything that', followed by a plural verb 'are' agreeing with the plural predicate nominatives 'secrets and lies'.
Morphology: 'Visions' is a plural noun. 'Surrounds' is the third person singular present tense verb. 'Tears' is a plural noun. 'Secrets' and 'lies' are plural nouns. The verb 'are' agrees with the compound subject 'secrets and lies'.

Syntax: This segment contains multiple simple sentences with future tense constructions ('I'll be', 'I'll give') showing promises. 'Keeping your faith when it's gone' is a participial phrase modifying the subject 'I'. 'The one you should call' is a noun phrase with an embedded relative clause ('you should call') that modifies 'the one'. 'Was standing here all along' is the main clause with past continuous tense indicating ongoing action in the past.
Morphology: 'I'll' is the contraction of 'I will'. 'Keeping' is the present participle. 'Gone' is the past participle of 'go'. 'Should' is a modal verb indicating obligation. 'Was standing' is past continuous tense (was + present participle). 'All along' is an adverbial phrase.

Syntax: This is a compound sentence with future tense ('I will take') followed by a coordinating conjunction 'and' connecting to another future action ('hold'). 'Where you belong' is an adverbial clause of place. 'Till the day my life is through' is an adverbial clause of time. 'This I promise you' uses an inverted structure for emphasis, with the direct object 'This' placed at the beginning of the sentence.
Morphology: 'Will take' and 'will hold' are future tense constructions. 'Belong' is a verb in present tense. 'Through' here functions as an adjective meaning 'finished' or 'completed'. 'Promise' is a verb in present tense.

Syntax: 'I've loved you forever' uses present perfect tense to indicate action that began in the past and continues to the present. 'In lifetimes before' is a prepositional phrase. 'And I promise you never will you hurt anymore' contains inversion ('never will you') for emphasis, which is common with negative adverbs at the beginning of clauses.
Morphology: 'I've' is contraction of 'I have'. 'Loved' is the past participle. 'Forever' is an adverb. 'Lifetimes' is a compound plural noun. 'Promise' is present tense verb. 'Never' is an adverb of frequency. 'Will you hurt' shows subject-verb inversion after 'never'. 'Anymore' is an adverb meaning 'any longer'.

Syntax: 'When I hear you call' is a dependent adverbial clause of time. The main clause 'Without you in my life, baby, I just wouldn't be living at all' uses the conditional structure 'wouldn't be' to express a hypothetical situation. 'Without you in my life' is a prepositional phrase functioning as a conditional clause.
Morphology: 'Hear' is present tense verb. 'Call' is the base form of the verb in infinitive without 'to' after 'hear'. 'Wouldn't' is contraction of 'would not'. 'Be living' is present continuous infinitive. 'At all' is an adverbial phrase emphasizing the negation.