Hypothetical and Unreal Constructions

English uses several grammatical structures to describe situations that are imagined, unlikely, contrary to fact, or impossible.

These are often called hypothetical or irrealis constructions.

Present or Future Hypotheticals

A hypothetical situation can be expressed with a past-form verb:

If I were rich, I would travel the world.

The past form were does not indicate that the situation happened in the past. Instead, it creates hypothetical distance.

Compare:

If I am free tomorrow, I will visit you.

This presents a realistic possibility.

If I were free tomorrow, I would visit you.

This presents the situation as more hypothetical or remote.

Were

The form were traditionally occurs with all persons in highly formal hypothetical constructions:

If I were you, I would accept the offer.
If he were here, he could help us.

In everyday English, was is also sometimes used, especially outside formal contexts:

If I was wrong, I apologize.

However, were remains the standard form in the classic hypothetical expression:

If I were you…

Wish

Wish can express dissatisfaction with the present or regret about the past.

For a present situation:

I wish I knew the answer.

For a past situation:

I wish I had studied harder.

For a desired change in another person’s behavior or an unwanted situation:

I wish you would stop making so much noise.

The verb form after wish helps establish the relationship between the desired situation and reality.

If Only

If only expresses a strong wish or regret:

If only I had more time!
If only she were here!
If only I had listened to your advice!

It is often more emotional or emphatic than ordinary if constructions.

Would Rather

Would rather can express preference:

I would rather stay home.

When the preferred action involves another person, a past form is commonly used:

I would rather you stayed here.

For past preferences or regrets:

I would rather you had told me earlier.

Hypothetical Meaning Without If

English can express hypothetical meaning without using if:

Suppose you lost your passport. What would you do?
Imagine you were living abroad.
What would happen if the system failed?

These structures are common in conversation, teaching, planning, and analytical writing.

Hypothetical constructions allow speakers to explore possibilities without asserting that those possibilities are real.