Who vs That: People or Things?

📌 Quick Answer

Who is preferred for people. That is used for things and can be used for people in defining clauses in informal style.

Memory Trick: If the noun is clearly a person, default to who in formal writing.

💡 Key Difference

Professional and academic writing usually prefers who for humans.

Quick Comparison

Form	Use It For	Quick Check
Who	Professional and academic writing usually prefers who for humans	Match the sentence meaning before you choose.
That	used for things and can be used for people in defining clauses in informal style	Match the sentence meaning before you choose.

Common Mistakes

❌ Incorrect:

"The teacher that inspired me retired."

✓ Correct:

"The teacher who inspired me retired."

For people, "who" is the safer and more natural choice.

❌ Incorrect:

"The book who won the prize is sold out."

✓ Correct:

"The book that won the prize is sold out."

Use "that" (or "which") for things, not "who."

🎯 Test Your Knowledge

1. The engineer ___ fixed the issue stayed late.

2. The tool ___ checks spelling is free.

Frequently Asked Questions

Is "that" wrong for people?

Not always. It appears in defining clauses, but many style guides still prefer "who."

What should I use in business writing?

Use "who" for people and "that" for things to avoid awkwardness.

Deep Dive

This topic appears in emails, reports, and essays. If you apply the quick rule above and check your sentence role, you can avoid the most common mistake.

For related usage patterns, see Relative Clauses and Who Vs Whom.

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Who vs That: A Practical Grammar Guide