Prepositions by/for

The prepositions at, on, and in

For Example:

• Someone is at the door.
• They are waiting at the bus stop.
• I used to live at 51 Portland Street.

We use on to show position on a horizontal or vertical surface.

For Example:

• The cat sat on the mat.
• The satellite dish is on the roof.

We also use on to show position on streets, roads, etc.

For Example:

• I used to live on Portland Street.

We use in to show that something is enclosed or surrounded.

For Example:

• The dog is in the garden.
• She is in a taxi.
• Put it in the box.

We also use in to show position within land-areas (towns, counties, states, countries, and continents).

For Example:

• I used to live in Nottingham.