📚 Plural Nouns: Regular & Irregular
How to form plurals — plus uncountable nouns that can't be pluralized
Regular Plurals
Most English nouns form the plural by adding -s. But there are important spelling rules for certain endings:
| Rule | Singular | Plural | Pattern |
|---|---|---|---|
| Most nouns: add -s | cat, book, day | cats, books, days | + s |
| Ends in -s, -sh, -ch, -x, -z: add -es | bus, dish, watch, box | buses, dishes, watches, boxes | + es |
| Ends in consonant + y: change to -ies | city, baby, story | cities, babies, stories | y → ies |
| Ends in vowel + y: add -s | boy, key, day | boys, keys, days | + s |
| Ends in -f or -fe: change to -ves | knife, wife, leaf | knives, wives, leaves | f/fe → ves |
| Ends in -o: usually add -es | tomato, potato, hero | tomatoes, potatoes, heroes | + es |
| Ends in -o (exceptions): add -s | photo, piano, zero | photos, pianos, zeros | + s |
Tip: The -f → -ves rule has exceptions: "roof → roofs," "chief → chiefs," "belief → beliefs." These just add -s. Unfortunately, you need to memorize which ones change and which don't.
Irregular Plurals
Some of the most common English nouns have irregular plural forms that don't follow the -s rule. These must be memorized:
| Singular | Plural | Type of Change |
|---|---|---|
| man | men | Vowel change |
| woman | women | Vowel change (pronounced "wimin") |
| child | children | -ren ending |
| foot | feet | Vowel change |
| tooth | teeth | Vowel change |
| goose | geese | Vowel change |
| mouse | mice | Vowel change |
| person | people | Completely different word |
| fish | fish | No change |
| sheep | sheep | No change |
| deer | deer | No change |
| aircraft | aircraft | No change |
Tip: The "no change" plurals (fish, sheep, deer) are common in animals. "I caught three fish" — not "fishes" (though "fishes" exists when talking about different species). "People" is the normal plural of "person" — "persons" is very formal/legal.
Uncountable Nouns
Some English nouns have no plural form at all — they are "uncountable." This is a major source of errors for German speakers, because many of these words DO have plurals in German.
| Uncountable Noun | German (countable!) | Wrong | Correct |
|---|---|---|---|
| information | Informationen (pl.) | informations | some information / pieces of information |
| advice | Ratschläge (pl.) | advices | some advice / pieces of advice |
| furniture | Möbel (pl.) | furnitures | some furniture / pieces of furniture |
| luggage/baggage | Gepäckstücke (pl.) | luggages | some luggage / pieces of luggage |
| news | Nachrichten (pl.) | a news | a piece of news / some news |
| homework | Hausaufgaben (pl.) | homeworks | some homework |
| research | Forschungen (pl.) | researches | some research |
| knowledge | Kenntnisse (pl.) | knowledges | some knowledge |
Tip: To count uncountable nouns, use "a piece of": "a piece of advice," "two pieces of furniture," "three pieces of information." Also remember: "news" looks plural but takes a singular verb: "The news is good" — not "The news are good."
Countable vs Uncountable — Quantity Words
Different quantity words go with countable and uncountable nouns. Using the wrong one is a very common error:
| Countable (plural) | Uncountable | Both |
|---|---|---|
| many books | much water | a lot of / lots of (books/water) |
| a few friends | a little money | some (friends/money) |
| few friends (= not enough) | little money (= not enough) | any (in questions/negatives) |
| How many books? | How much water? | enough (books/water) |
| several ideas | — | no (books/water) |
Tip: "Few" and "little" without "a" have a negative meaning — "few friends" means not many, implying loneliness. "A few friends" is positive — you have some. Same with "little money" (barely any) vs "a little money" (some, enough).
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