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Touching, resting on or fixed to the surface of something.

• I left your keys on the kitchen table.
  Anahtarlarını mutfak masasının üstünde bıraktım.
• There's a beautiful picture on the wall.
  Duvarda çok güzel bir resim var.

Used to say on which day or date something happens.

• The shop is closed on Sundays.
  Dükkân pazar günleri kapalı.
• We got married on the fifth of June.
  Beş Haziran'da evlendik.

About a particular subject.

• She wrote a book on Turkish cooking.
  Türk mutfağı üzerine bir kitap yazdı.
• We watched a programme on climate change.
  İklim değişikliği hakkında bir program izledik.

Used with buses, trains, planes, bikes and horses, and in the phrase on foot.

• I usually read a book on the bus.
  Otobüste genellikle kitap okurum.
• She goes to school on foot every day.
  Her gün okula yürüyerek gidiyor.

Used to show the device, programme or system through which something is seen, heard or done.

• Is there anything good on TV tonight?
  Bu akşam televizyonda güzel bir şey var mı?
• He's been on the phone for an hour.
  Bir saattir telefonda.

Used to show a position, such as a side, floor, street, page or coast.

• Our flat is on the third floor.
  Dairemiz üçüncü katta.
• The bank is on the left, next to the café.
  Banka solda, kafenin yanında.

Used to say that someone has something in a pocket or bag, or is carrying it.

• Do you have any cash on you?
  Yanında hiç nakit var mı?
• I don't have my passport on me right now.
  Pasaportum şu an yanımda değil.

Used to show that someone is a member of a group, team or committee.

• She has been on the school team for two years.
  İki yıldır okul takımında.
• There are five people on the committee.
  Kurulda beş kişi var.

Used to show that someone or something is doing an activity or is in a particular state.

• My boss is on holiday this week.
  Patronum bu hafta tatilde.
• These shoes are on sale at half price.
  Bu ayakkabılar yarı fiyatına indirimde.

Immediately after something happens.

• On arrival, please go to the front desk.
  Varışınızda lütfen resepsiyona gidin.
• She burst into tears on hearing the news.
  Haberi duyunca gözyaşlarına boğuldu.

Used to say who pays for something.

• Put your money away, dinner is on me tonight.
  Paranı cebine koy, bu akşam yemek benden.
• The dessert is on the house tonight.
  Bu akşam tatlı müesseseden.

Used to show what something uses as power, or what someone lives or depends on.

• Our new car runs on electricity, not petrol.
  Yeni arabamız benzinle değil, elektrikle çalışıyor.
• She lives on a very small salary.
  Çok küçük bir maaşla geçiniyor.