notadictionary.com
Quand tu t'aperçois qu'il est peut-être temps de changer tes pneus..
→ “When you realize it might be time to change your tires..”
Quand — when
tu — you
t'aperçois — realize → reflexive verb 'se rendre compte', here in present tense; the 't'' is a contraction of 'te' before a vowel.
qu'il — that it → contraction of 'que il'; used as a conjunction introducing a clause.
est — is → third-person singular present tense of 'être' (to be)
peut-être — might be / perhaps → fixed adverbial expression indicating possibility or uncertainty
temps — time
de — of / to → preposition introducing infinitive verb phrase
changer — change → infinitive verb
tes — your → possessive adjective, plural form agreeing with 'pneus'
pneus — tires
