Prepositions

Grammar Rule

পদান্বয়ী অব্যয় — Prepositions

সময়ের Preposition (Time):
  at  → নির্দিষ্ট সময়: at 9 AM, at noon, at midnight
  on  → দিন / তারিখ: on Monday, on 15th March, on my birthday
  in  → মাস / বছর / মৌসুম: in June, in 2010, in winter, in the morning
  for → সময়কাল (duration): for three years, for a week
  since → নির্দিষ্ট সময় থেকে এখন পর্যন্ত: since 2015, since Monday
  by  → সময়সীমা (deadline): by Friday, by 5 PM (ঐ সময়ের মধ্যে)

স্থানের Preposition (Place):
  at → নির্দিষ্ট বিন্দু: at the bus stop, at home, at school
  on → পৃষ্ঠ: on the table, on the wall, on the floor
  in → বদ্ধ স্থান: in the room, in Dhaka, in Bangladesh

যানবাহনের Preposition (Transport):
  by → by bus, by train, by car, by plane  (article ছাড়া!)

💡 at / on / in মনে রাখার ছন্দ:
  at (বিন্দু) → on (রেখা/পৃষ্ঠ) → in (ভেতর)
  at the corner → on the road → in the city

💡 for vs since:
  for + সময়কাল  → for 3 years (৩ বছর ধরে)
  since + সময়   → since 2020 (২০২০ থেকে)

⚠️ সাধারণ ভুল:
  She has lived here since ten years.  ❌  (since → for)
  She has lived here for ten years.    ✅
  The meeting is on 9 AM.  ❌  (on → at)
  The meeting is at 9 AM.  ✅