1. 只用复数形式的名词：
aborigines, antipodes, annals, banns, bellows, breeches,
matins, measles, news, nuptials, oats, pincers,
scissors, shears, tidings, trousers, vespers, victuals.
2. 单复数形式相同的名词：
deer, trout, sheep, heathen, perch,
grouse, salmon, swine, cannon, pike.
3. 有两种复数，且意思不同的名词：
=单数= =复数= =复数=
penny, pennies (a number.) pence (a sum.)
pea, peas (a number.) pease (a quantity.)
brother, brothers (same family.) brethren (same society.)
die, dies (for stamping.) dice (for gaming.)
cloth, cloths (kinds of cloth.) clothes (garments.)
index, indexes (to a book.) indices (in algebra.)
genius, geniuses (men of talent.) genii (spirits.)
4. 复数形式有不同含义的名词：
compass, compasses,
iron, irons,
good, goods,
salt, salts,
corn, corns.
5. 复数形式有两种意思的名词：
=单数= =复数= =复数=
custom, customs (habits.) customs (revenue duties.)
letter, letters (alphabet.) letters (literature.)
number, numbers (in counting.) numbers (poetry.)
part, parts (divisions.) parts (abilities.)
