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ドンキで高校生カップルが手繋いで買い物してた 今お前らが…
→ “I saw a high school couple holding hands shopping at Don Quijote. You guys now... (implying: you're not like that anymore).”
ドンキ donki = Don Quijote (proper noun, nickname for the store)
で de = at / in (location particle)
高校生 kō¹kō¹sei = high school student (noun)
高 kō¹ = high / tall
校 kō¹ = school
生 sei = student / life
カップル kappuru = couple (loanword from English)
が ga = (subject marker particle)
手繋い te tsunai = holding hands (verb stem)
手 te = hand
繋い tsunai = connect / link
で de = by means of / while doing (particle)
買い物 kaimono = shopping / purchase (noun)
買 kai = buy
物 mono = thing / goods
してた shiteta = was doing (past continuous colloquial form)
し shi = do
て te = connecting particle
た ta = past tense marker
今 ima = now (adverb)
お前ら omera = you guys (informal/plural pronoun)
お前 omae = you (rude/informal)
ら ra = plural suffix
が ga = (focus/topic marker particle)
