Active vs Passive — Why & When

A sentence can be active or passive. Here's the first thing to get straight: neither one is wrong. You may have heard a teacher say "avoid the passive," but that's far too blunt to be true. The real skill is knowing when to use each, because each one puts the spotlight in a different place. Students find this tricky mostly because the two look similar — both describe the same event — but they arrange the words differently and, crucially, they can feel completely different to a reader. Once you can spot which is which and choose on purpose, you gain a surprising amount of control over your writing.

The difference

• Active: the doer comes first. The dog chased the ball. → direct and lively.
• Passive: the thing it happened to comes first, and the doer moves back or vanishes. The ball was chased (by the dog).

Same event, different spotlight. In the active version, the dog is the star. In the passive version, the ball takes centre stage and the dog is pushed to the end — or dropped altogether: "The ball was chased."

How to spot the passive

Passive sentences follow a very consistent recipe. Look for two things stuck together: a form of the verb be (is, was, were, been, being) plus a past participle (the -ed or irregular form — chased, broken, eaten, written). If you can also add "by someone" to the end and it still makes sense, you've almost certainly found a passive:

The window was broken (by someone). — be + past participle → passive. Someone broke the window. — the same event, active.

That little "by someone" test is your quickest way to check. If it slots on naturally, the sentence is passive.

When to use active (most of the time)

Active is usually clearer, shorter and more energetic, so make it your default:

✓ Scientists discovered a new planet. — not A new planet was discovered by scientists.

The active version is punchier and tells you straight away who did what. In most of your writing — stories, opinion pieces, everyday emails — active keeps things moving.

When passive is the better choice

Reach for the passive when the doer is unknown, unimportant, or when you genuinely want to focus on the thing rather than the person:

The window was broken. (we don't know who did it) The results were checked three times. (the checking matters, not who did it) Chocolate is made from cocoa beans. (no particular person — it's a general process)

Notice the pattern: in each case, naming a doer would be either impossible, obvious, or beside the point. That's exactly when the passive earns its place.

More worked examples

• ✓ My bike was stolen last night. (passive — good, because we don't know the thief)
• ✗ Mistakes were made by me. → ✓ I made mistakes. (active is more honest and direct)
• ✓ The samples were heated to 100°C. (passive — fine in a science write-up, where the steps matter)
• ✓ The Romans built this wall. (active — clearer than "This wall was built by the Romans")
• ✓ Helmets must be worn on site. (passive — natural on a sign, where nobody needs naming)

Watch out — too much passive is murky

Overusing the passive makes writing feel heavy, vague, and sometimes a bit shifty:

✗ It was decided that the trip would be cancelled. (who decided? it's hidden) ✓ The teachers cancelled the trip. (clear — we know exactly who acted)

This is where the passive gets a bad name. People sometimes use it to dodge responsibility — "Mistakes were made" quietly avoids saying "I made a mistake." So if you ever need to own up to something, the active is braver and more trustworthy: "I forgot to hand it in" beats "The homework was not handed in."

An edge case: the same fact, two different spotlights

Here's a clever thing you can do once you're comfortable with both voices: change what a sentence emphasises without changing a single fact. Imagine you're writing up something that happened in a football match. "Sam scored the winning goal" is active, and it puts Sam in the spotlight. "The winning goal was scored by Sam" is passive, and it puts the goal first — handy if the goal is really what your paragraph is about. Both are completely true; they just point the reader's attention at different things. Good writers use this on purpose. If a person is the important part, go active and lead with them. If the event or the result is the important part, the passive lets you lead with that instead. Try rewriting one of your own sentences both ways and notice how the feeling shifts even though the facts stay put — that's the whole power of voice in a nutshell.

Why it matters

Choosing your voice on purpose is one of the marks of a confident writer, and it shows up everywhere in real life. In a science report, the passive keeps the focus on the experiment — "the liquid was measured and then heated" — rather than on a running commentary of "I did this, then I did that." In a story, the active brings your characters to life — "she flung open the door" has energy that "the door was flung open" just doesn't. And when you're apologising or explaining, the active shows you're being straight with your reader instead of hiding behind vague wording. Markers notice all of this. Being able to switch between the two voices — and say why you picked one — lifts your writing from "correct" to genuinely controlled.

Quick check

Active or passive — and is it a good choice?

1. My bike was stolen.

2. Mistakes were made by me.

3. The chef cooked a wonderful meal.

4. It was felt that the plan should be changed.

5. Helmets must be worn on the building site.

Where next

• Forming the Passive Across Tenses — how to build it.
• The Get-Passive — got broken, got told.
• Active or Passive Voice? (Style) — the style angle.