Random Preposition Generator

How this preposition generator works

You need a preposition, or a set of them. Maybe you are teaching grammar, building exercises for an English class, or just want examples of these small connecting words. This tool gives you one in a tap. And here is a bonus most generators cannot claim: because there are so few prepositions in the whole language, this list of around 130 covers very nearly all of them.

The list was checked by hand, so you get real prepositions and not stray words that wandered in. Press Generate for one, or set the Number box from 1 to 100 for a batch with no repeats. Each one comes back with a capital letter.

The three filters narrow things down:

• Starts with: a single letter for prepositions beginning with it.
• Contains: a few letters for prepositions with that string inside.
• Ends with: a single letter for prepositions ending with it.

Combine them if you want, and use Copy to lift the whole list. Because the full set is so small, if you ask for a large batch you will quickly see most of the prepositions English has. That is not true of the noun or verb tools, and the next couple of sections explain why.

What a preposition does

A preposition shows a relationship, usually between a noun and the rest of the sentence. It tells you where, when, or in what direction. The cat sat on the mat. On is the preposition, pinning the cat's position to the mat. Swap it and the whole picture changes: under the mat, beside the mat, near the mat. Small word, big effect. The common ones are in, on, at, by, for, with, to, from, over, and under.

Why there are so few prepositions

Here is what makes prepositions genuinely different from nouns, verbs, and adjectives. They are a closed class.

English word types come in two kinds. Open classes, like nouns and verbs, keep growing. New nouns get coined all the time, selfie, podcast, and nobody has to approve them. Closed classes, like prepositions, are basically fixed. The language has the prepositions it has, and new ones almost never appear.

That is why a list of around 130 can cover the category. There are only so many prepositions, full stop. A noun generator could never claim that, because the nouns are effectively endless. So this tool is less a random sample and more a near-complete set you can browse through.

Prepositions of place, time, and direction

Prepositions sort neatly by the kind of relationship they show:

• Place, showing where. in the box, on the table, under the bed, between the trees.
• Time, showing when. at noon, on Monday, in July, before lunch, during the film.
• Direction and movement, showing which way. to the shop, into the room, across the road, towards the door.

A few double up. "In" can be place ("in the box") or time ("in July"). Which one it is depends entirely on what follows it.

What a prepositional phrase is

A preposition almost never travels alone. It grabs a noun, or a noun phrase, and forms a prepositional phrase: on the table, after the meeting, with great care. The preposition is the anchor, and the noun after it is called its object. These phrases then slot into sentences to add detail about place, time, or manner, doing a job much like an adverb. "She waited" becomes "She waited in the rain", and now you know where.

The myth about ending a sentence with one

You have probably been told never to end a sentence with a preposition. "Where are you from?" should apparently be "From where are you?". Here is the good news: that rule is a myth, and it always was.

It came from writers a few centuries ago trying to force English to behave like Latin, where stranding a preposition does not work. English is not Latin. Ending a sentence with a preposition is natural, correct, and often the only version that does not sound stiff. "What are you looking at?" is fine. "At what are you looking?" is the sentence nobody actually says.

Every major usage guide today agrees. So generate your prepositions freely and put them wherever the sentence sounds best, including right at the end.

Ways people use random prepositions

• Grammar teaching. Prepositions are one of the hardest things for English learners, because they rarely translate word for word. A set to build exercises around is genuinely useful.
• Sentence-building drills. Give a preposition and have students build a phrase, then a full sentence, around it.
• ESL practice. Pull place, time, and direction prepositions and sort them, or drop them into gapped sentences.
• Quick reference. Because the list is near-complete, it doubles as a handy check of the prepositions English actually has.

Questions people ask

Can you end a sentence with a preposition?

Yes. The old rule against it is a myth borrowed from Latin. "Who are you going with?" is correct and natural. Forcing "With whom are you going?" is only worth it in very formal writing, if at all.

How many prepositions are there in English?

Somewhere around 150, depending on how you count compound ones like "in front of". It is a small, fixed set, which is why this tool can cover almost all of them.

Is "before" a preposition or a conjunction?

It can be both. In "before lunch" it is a preposition. In "before I leave" it introduces a clause, so it is acting as a conjunction. The word after it tells you which.

What is a prepositional phrase?

A preposition plus its object, like "under the table" or "after the show". The phrase adds detail about place, time, or manner.

References

1. Cambridge Dictionary, Prepositions
2. Cambridge Dictionary, Word classes and phrase classes
3. Oxford English Dictionary