2. NOUNS
THE USE OF PLURALS

3. THE USE OF “S” CASE
Nº 1
The plural is
formed by adding
final “-S” to a noun.
SINGULAR PLURAL
Song Songs
Car Cars
Dog Dogs
Game Games

4. CASE
THE USE OF “ES” Nº 2
The plural is
formed by
adding final
SINGULAR PLURAL
“-ES” in words
that end in:
Box Boxes
Bus Buses
-sh, -ch, -s, -z
Flash Flashes
and –x.

5. THE USE OF “ES” CASE
Nº 4
The plural is
formed by adding
final “-ES” to
nouns that end in
“o”. SINGULAR PLURAL
Echo Echoes
Hero Heroes
Potato Potatoes
Tomato Tomatoes

6. THE USE OF “IES” CASE
Nº 3
When a noun ends in
“y” you have to
change the “y” by “i”
and then you add
the“ES”.
SINGULAR PLURAL
Baby Babies
Try Tries
Lady Ladies

7. THE USE OF “-VES” CASE
Nº 5
Some nouns that end in “-
F” or “FE” are changed
to “-VES” to form the
plural.
SINGULAR PLURAL
Thief Thieves
Knife Knives
Life Lives
Self Selves
Wolf Wolves

8. CASE
IRREGULAR NOUNS Nº 6
Some nouns have
irregular plural forms
that do not end in “S”
SINGULAR PLURAL
Men
Man
Women
Woman
Children
Child
Oxen
Ox
Feet
Foot
Geese
Goose
Mice
Mouse
Lice
Louse

9. IRREGULAR NOUNS CASE
Nº 7
Some nouns have
irregular plural forms
that do not end in “S”.
SINGULAR PLURAL
Criterion Criteria
Phenomenon Phenomena

10. CASE
IRREGULAR NOUNS Nº 8
Some nouns that end in “-
us” you have to change by
adding “i” at the end.
SINGULAR PLURAL
Cactus Cacti
Stimulus Stimuli
Sillabus Silabi
Nucleus Nuclei
Fungus Fungi

11. CASE
IRREGULAR NOUNS Nº 9
Some nouns that end in “-
a” you have to add “-e” in
the end.
SINGULAR PLURAL
Formula Formulae
Vertebra Vertebrae

12. CASE
IRREGULAR NOUNS Nº 10
Some nouns have
irregular plural forms
that do not end in “S”
SINGULAR PLURAL
Appendix Appendices
Index Indexes

13. CASE
IRREGULAR NOUNS Nº 11
In this type of nouns
you to change the “is”
by “es” at the end of
the noun.
SINGULAR PLURAL
Analysis Analises
Basis Bases
Crisis Crises
Hypothesis Hypotheses
Parenthesis Parentheses

14. CASE
IRREGULAR NOUNS Nº 12
In some nouns that
end in “-um” you have
to change it by “-a”.
SINGULAR PLURAL
Bacterium Bacteria
Curriculum Curricula
Datum Data
Medium Media
Memorandum Memoranda

15. SINGULAR NOUNS THAT DO NOT CASE
CHANGE IN PLURAL Nº 13
Some nouns have the
same singular and
plural form:
SINGULAR PLURAL
One deer Two deer.
One sheep Three sheep.
One species Four species.
One series Five series.

16. PROFESSOR: AMERICO PINEDA V
LEARNERS: JIMENA QUISPE P.
CESAR VILLCA Q.
2013
LA PAZ-BOLIVIA