🤔 Grammar · Commonly Confused Words
I.e. vs E.g.
Two Latin abbreviations that show up in every review and essay — one gives examples, the other restates exactly what you mean. Here’s how to never mix them up again.
Grammar › Commonly Confused Words › I.e. vs E.g.
The rule in one sentenceUse e.g. to introduce examples from a longer list (“like this, or this”) and i.e. to restate or clarify exactly what you mean (“in other words, this”) — if you could swap in “for example”, use e.g.; if you could swap in “that is”, use i.e.
What’s the difference?
Both i.e. and e.g. are abbreviations of Latin phrases, and both get dropped into English sentences to add extra information — which is exactly why they’re constantly confused. But they do two completely different jobs.
E.g. stands for exempli gratia, literally “for the sake of example”. It introduces one or more examples from a longer, non-exhaustive list. When we say Kiyoshi Kurosawa is known for slow-building psychological horror, e.g. Cure, Pulse and Tokyo Sonata, we’re naming a sample — Kurosawa has made other films too, and the list doesn’t claim to be complete.
I.e. stands for id est, literally “that is”. It restates or clarifies precisely what you mean — it renames something rather than sampling from it. When we say the film about a cursed videotape that kills its viewers, i.e. Ringu, there’s only one correct answer, and i.e. pins it down exactly.
🎬 Compare: “J.K. Simmons has taken supporting roles across several award-winning films, e.g. alongside Diego Luna and Vincent Cassel in different projects” (a sample of the actors he’s shared a set with, not the full list) vs. “The actor who won the Academy Award for Best Supporting Actor for playing a demanding music teacher, i.e. J.K. Simmons, remains one of the most recognisable character actors working today” (only one actor fits that description, so this restates exactly who).
The words after e.g. could be swapped for other examples; the words after i.e. could only ever be that one specific thing.
A simple substitution test settles almost every case: if you can replace the abbreviation with “for example” and the sentence still makes sense, you need e.g. If you can replace it with “that is” or “in other words”, you need i.e. The two phrases are never interchangeable, because one gives a sample and the other gives a definition.
How to use each one
e.g. — for example
- From Latin exempli gratia, “for the sake of example”.
- Introduces one or more items from a non-exhaustive list — there are always more examples that could follow.
- Can always be replaced with “for example”, “such as”, or “for instance”.
- Kaneto Shindo’s films are known for stark, deliberate visual compositions, e.g. The Naked Island.
i.e. — that is
- From Latin id est, “that is”.
- Restates or clarifies something exactly — it renames, it doesn’t sample.
- Can always be replaced with “that is”, “in other words”, or “namely”.
- The Swedish actress known for her commanding screen presence in several major franchise films, i.e. Rebecca Ferguson, brings unmistakable intensity to every role she takes.
When to use which
Use E.G. when…
- You’re giving a sample from a bigger group. Many Studio Ghibli films explore grief, e.g. Grave of the Fireflies and Only Yesterday.
- Other correct examples could replace the ones you chose.
- You could naturally say “such as” or “like” instead.
Use I.E. when…
- You’re giving the one correct clarification, not a choice. The Japanese film nominated for the Academy Award for Best Foreign Language Film in 1965, i.e. Woman in the Dunes, remains a landmark of arthouse cinema.
- Nothing else could be substituted without changing the meaning.
- You could naturally say “that is” or “in other words” instead.
Signal words: your instant clue
Because these abbreviations are really just shorthand for longer phrases, the phrase you’d naturally say out loud tells you which one to write.
e.g. signals
i.e. signals
Visual guide
Teacher Teddy’s illustrated guide to this rule is being drawn — the full swipe-through infographic will appear here soon.
Common mistakes
❌ Contemporary character actors have found international acclaim in different ways, i.e. Javier Cámara, Antonio Banderas and Timothy Chalamet’s co-star Rebecca Ferguson.
✅ Contemporary character actors have found international acclaim in different ways, e.g. Javier Cámara, Antonio Banderas and Timothy Chalamet’s co-star Rebecca Ferguson.
This is a sample list — many other acclaimed actors could be named too — so it needs e.g., not i.e.
❌ Mads Mikkelsen won the top acting prize, e.g. Best Actor, at the 2012 Cannes Film Festival.
✅ Mads Mikkelsen won the top acting prize, i.e. Best Actor, at the 2012 Cannes Film Festival.
There’s only one “top acting prize” being named exactly, not a sample of several — that calls for i.e.
❌ Yalitza Aparicio received a nomination for her breakout role, eg Best Actress, at the Academy Awards.
✅ Yalitza Aparicio received a nomination for her breakout role, i.e., Best Actress, at the Academy Awards.
Both abbreviations need periods after each letter and a comma before and after — “ie” alone isn’t standard punctuation.
Exceptions & tricky cases
1. Both are always lowercase, even after a full stop. “Kiyoshi Kurosawa’s slow-building horror classic (i.e., Cure) redefined psychological horror for a new generation” — never capitalise “i.e.” or “e.g.” mid-sentence just because they follow punctuation.
2. Formal writing often avoids the abbreviations altogether. Many academic film journals and style guides prefer spelling out “for example” and “that is” in body text, reserving i.e./e.g. for footnotes, parentheses or informal writing.
3. Don’t confuse either one with “etc.” “The Ju-On franchise features a vengeful ghost, a cursed house, jump scares, etc.” closes an incomplete list without needing an example marker at all — etc. does a different job from both i.e. and e.g.
4. “Ex.” is not a standard substitute for e.g. Some informal writing shortens “for example” to “ex.”, but in edited English only “e.g.” is correct.
Practice: choose the right abbreviation
Eight quick questions. Pick the answer you’d actually write — you get the explanation either way.
1. Kaneto Shindo’s films are known for stark visual compositions, ___ The Naked Island.
One example among several of his films → “e.g.”
2. The film that swept the 1988 Oscars, ___ The Last Emperor, won Best Picture.
Only one film fits — this restates exactly which one → “i.e.”
3. Many Studio Ghibli films explore grief, ___ Grave of the Fireflies and Only Yesterday.
A sample of Studio Ghibli films, not all of them → “e.g.”
4. The film that won the Special Jury Prize at Cannes in 1965, ___ Kwaidan, remains a landmark of Japanese horror.
Restating the one specific film meant → “i.e.”
5. Studio Ghibli has released dozens of hand-drawn films, ___ Princess Mononoke and My Neighbor Totoro.
A sample from a much longer list → “e.g.”
6. The actor known for his unmistakable intensity in supporting roles across major studio films, ___ Michael Shannon, has become one of the most recognisable character actors of his generation.
Naming exactly who is meant, no alternative possible → “i.e.”
7. Several film franchises have relied on well-known character actors to anchor their casts, ___ Nick Frost and Salma Hayek.
A sample of well-known character actors, not the full list → “e.g.”
8. The first Korean zombie film to become a global Netflix hit, ___ #Alive, broke streaming records in 2020.
Restating exactly which single film is meant → “i.e.”
Keep going
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