√ In
√ At
√ On
A. In:
in a room (в комнате),
in a building (в здании),
in a box (в коробке),
in a garden (в саду),
in a town/city (в городе),
in a country (в стране)
- There's someone in the building/in the room/in the garden.
- What has little Mark got in his mouth/ in hishand?
- When I was in Spain, I spent a few days in Barselona. (не 'at Barselona')
- My father has many friends who live in a small village in the mountains.
- Look at those children swimming in the sea/ in the pool/in the river.
B. At 
at the bus stop – на остановке,
at the door – у двери,
at the window – у окна,
at the top (of the page) – вверху (страницы),
at the bottom (of the page) – внизу страницы,
at the end of the street – в конце улицы
- Who is this woman standing at the door/at the bus stop/at the window? - Кто эта женщина, которая стоит у двери/на автобусной остановке/у окна.
- Turn right at the church/at the traffic lights/at the roundabout. - Поверни направо у церкви/ на светофоре/ перекрёстке с круговым движением.
- Write your name at the top/at the bottom of the page. - Напиши свое имя вверху/внизу страницы.
- Steve's house is the brown one at the end of the street. - Дом Стива коричневый в конце улицы.
- When you go away on business, please leave your keys at your neighbor. - Когда поедешь в командировку оставь ключи у своего соседа.
C. On - на 
on the ceiling-на потолке,
on the wall – на стене,
on the door – на двери,
on the table – на столе,
on her nose – на носу,
on the floor – на полу,
on a page – на странице.
- I sat on the floor (на полу)/on the ground (на земле)/on the grass (на траве)/on a chair (на стуле)/on the beach (на пляже).
- There's a dirty mark on the wall (на стене) / on the ceiling (на потолке)/on your nose (на носу)/on your shirt (на рубашке).
- Have you seen the notice on board (на доске)/on the door (на двери)?
- You'll find details of this accidence on page 2 (на странице два)(of the newspaper).
D. Сравните in и at:
- There are a lot of children in the library (В библиотеке много детей). It was very crowded. (Она переполнена).
- Go along this road, then turn left at the shop. (Иди по дороге, затем поверни налево у магазине)
Сравните in и on:
- There is some water in the bottle.(В бутылке немного воды) but There is a label on the bottle (Но на бутылке наклейка).
Сравните at и on:
- There is somebody at the door. (Кто-то стоит у двери) Shall I go and see who it is? (Мне пойти и посмотреть кто это?) but There is a notice on the door (но на двери записка). It says 'Do not disturb' ( в ней говориться " Не беспокоить")