What the Teacher Needs to Know about More Plurals
(Description – 179, Word Lists – p. 278)
Many of the Latin-based words form plurals in ways other than the traditional addition of
s or es. Examples are crisis/crises, bacterium/bacteria, persona/personae, and
radius/radii. Many of these words also have another acceptable plural form that involves
simply adding s or es. Scientific terminology is often involved in words that form plurals
in these ways. When students are working at the derivational constancy stage, they are
ready to learn about these plural forms.
More Plurals Sort 1b
hypothesis
hypotheses
alumna
alumnae
larva
larvae
larvas
emphasis
emphases
oasis
oases
vertebra
vertebrae
vertebras
parentheses
parenthesis
hypothesis
larva
emphasis
vertebra
parenthesis
hypotheses
larvae
emphases
vertebrae
parentheses
alumna
larvas
oasis
vertebras
alumnae
oases
More Plurals Sort 1b
sis to ses
hypothesis/hypotheses
emphasis/emphases
oasis/oases
parenthesis/parentheses
a to ae (also add s)
alumna/alumnae
larva/larvae/larvas
vertebra/vertebrae/vertebras
Transfer Words: thesis/theses, antenna/antennae/antennas
More Plurals Sort 2b
radius
radii
radiuses
atrium
atria
atriums
bronchus
bronchi
fungus
fungi
funguses
nautilus
nautili
nautiluses
datum
data
addendum
addenda
radius
atria
fungus
nautili
addendum
radii
atriums
fungi
nautiluses
addenda
radiuses
bronchus
funguses
datum
atrium
bronchi
nautilus
data
More Plurals Sort 2b
us to i (also add es)
radius/radii/radiuses
bronchus/bronchi
fungus/fungi/funguses
nautilus/nautili/nautiluses
um to a (also add s)
atrium/atria/atriums
datum/data
addendum/addenda
Transfer Words: cactus/cacti, bacterium/bacteria