notadictionary.com
Il parlait de lui tout au long du dîner, et il m'a ensuite conduit autour de la ville pour me montrer où habitaient ses ex.
→ “He talked about himself the entire dinner, and then he drove me around the city to show me where his exes lived.”
Il parlait — talked / was talking (imperfect tense, 3rd-p. singular of parler)
de — of / about (preposition linking verb to object)
lui — himself (reflexive indirect object pronoun)
tout — all / completely (adverb modifying duration)
au long — length / duration (noun; part of fixed phrase 'tout au long')
du dîner — dinner (noun; mealtime context)
et — and (coordinating conjunction)
il m' — me (elided form of me before vowel sound)
a — has / did (auxiliary verb for passé composé)
ensuite — then / afterwards (adverb indicating sequence)
conduit — drove / led (past participle of conduire; used with avoir here)
autour — around (preposition/adverb indicating movement)
de — of / around (preposition introducing location)
la ville — city (feminine noun; urban area)
pour — in order to / to (purpose marker introducing infinitive)
me — me (direct object pronoun)
montrer — to show (infinitive verb; action intended by 'pour')
où — where (interrogative/adverbial relative adverb)
habitaient — lived (imperfect tense, 3rd-p. plural of habiter)
ses — his/her/their (possessive adjective; plural form here)
ex — ex(es) (informal abbreviation for ex-petite amie/ex-petit ami)