In, On, and Under: Where Is It?

“The ball is in the box,” “The ball is on the box,” and “The ball is under the box” describe three different positions. The noun stays the same, while the preposition changes the picture in the listener’s mind.

Use in for the inside of a space, on for contact with a surface, and under for a position lower than another object, often directly beneath it. Start with these physical meanings, then practise describing a real room.

In: inside a space or area

“The book is in the bag” means the bag contains the book. “She is in the kitchen” places her inside that room.

In can also describe an area without a complete enclosure: “The children are in the garden.” You are treating the location as a space with an inside, rather than describing surface contact.

On: touching a surface

“The book is on the table” places the book against the tabletop. “The painting is on the wall” describes contact with a vertical surface.

On does not require the object to be above a horizontal surface. A light can be on the ceiling, and a label can be on the side of a box. The relevant idea is attachment or surface contact.

Under: lower than another object

“The cat is under the bed” places the cat beneath the bed. “The shoes are under the table” describes a similar relationship, usually within the space below the tabletop.

Under does not require contact: a cat can sit on the floor with a gap above it. It can also describe covering or contact in examples such as “a shirt under a jacket.”

The object and situation help you interpret the exact position. A sticker on a box may be attached to its side, so on does not always mean on top.

Under or below?

Both words can describe a lower position. Under often presents one object as beneath another or covered by it; below focuses on a lower level without necessarily implying direct alignment.

“The shelf is below the window” tells you its relative height. “The shoes are under the chair” gives a natural description of their place beneath the chair. The meanings overlap in some locations, so neither word belongs to a completely separate set of physical situations.

Use below for common measurements and levels, such as “below zero.” These uses go beyond the simple object-location meaning practised here.

Describe one room

Imagine this room: a desk stands beside a window, a bag rests on the desk, and a notebook is inside the bag. A pair of shoes is on the floor beneath the desk, and a clock hangs on the wall.

The bag is on the desk, but the notebook is in the bag. The shoes are under the desk, and the clock is on the wall. Each preposition gives the listener a different spatial relationship.

Parent: Where’s your notebook?
Student: It’s in my bag.
Parent: And where’s the bag?
Student: On the desk, next to the window.

The short reply “On the desk” works because the question supplies the subject and verb. In a full sentence, write “The bag is on the desk.”

Common mistakes to avoid

Do not use in when an object simply rests against a surface: “The phone is on the desk” is the usual description. “The phone is in the desk” would suggest a drawer or another interior space.

Keep the verb be in a full location sentence. “The keys under the chair” is a noun phrase or fragment; “The keys are under the chair” is a complete statement.

Practice: find the objects

Use the room description above for the first four questions. Then correct the sentences or answer the meaning question.

1. The notebook is _____ the bag.
2. The bag is _____ the desk.
3. The shoes are _____ the desk.
4. The clock is _____ the wall.
5. Correct the missing verb: “My books in the cupboard.”
6. A notice is attached to the ceiling. Should you say on the ceiling or above the ceiling?
7. Does “under the bed” necessarily mean touching the bed?
8. Write a full sentence about an object inside something near you.

Answers and explanations

1. In. The bag contains the notebook.
2. On. The bag rests on the desk’s surface.
3. Under. The shoes are beneath the desk.
4. On. The clock is attached to the wall.
5. My books are in the cupboard. Add are for the plural subject.
6. On the ceiling. The notice is attached to its surface; above would place it at a higher level.
7. No. There may be space between the object and the bed.
8. One possible answer is My pen is in a drawer. Your answer should identify an object, use is or are, and describe its position accurately.