What is Number in English Grammar and How to Change It

Here you can learn about singular and plural number in English grammar and how can we change it. There also you can find what is number definition.

what is number definition

What is Number?

The number is a category of the words: Noun, Pronoun, Adjective, and Verb. There are two types of number. 1. Singular and 2. Plural.

Every noun, pronoun, and verb has two categories Singular and Plural. Some adjectives also have singular and plural.

In English Grammar, misuse of singular and plural is incorrect. That is why we should be aware of using word with correct number.

Some Examples of Number in English Grammar

Word	Singular Example	Plural Example
Noun	Book, Boy, Cat, Woman	Books, Boys, Cats, Women
Pronoun	I, You, He, She	we. you, they
Verb	does, is/am, was, has	do, are, were, have
Adjective	This, That, His, Her, Your	Those, Their, Your

How to Change The Number in English Grammar

Rule 1: Change (SIS)  to (SES)

Singular (sis)	Plural (ses)
Analysis	Analyses
Axis	Axes
Basis	Bases
Crisis	Crises
Diagnosis	Diagnoses
Hypothesis	Hypotheses
Oasis	Oases
Thesis	Theses
Parenthesis	parentheses
Synopsis	Synopses

Rule 1: Change (UM)  to (A)

Singular (um)	Plural (a)
Agendum	Agenda
Datum	Data
Erratum	Errata
Medium	Media
Memorandum	Memoranda
Referendum	Referenda

Rule 1: Change (US)  to (I)

Singular (us)	Plural (i)
Focus	Foci/Focuses
Genius	Genii/Geniuses
Locus	Loci
Radius	Radii
Stimulus	Stimuli
Syllabus	Syllabi
Terminus	Termini
Exceptional
Genus	Genera
Corpus	Corporal/Corpuses

Exercises of Numbers in English Grammar 

• The singular form of ``Bacteria’’ is ------------
1. Bacteriam   2. Becterian
3. Becteriem   4. Becterium
• Which one of the following word is in the plural form?
1. Analysis     2. Radius
3. Datum        4. Media
• Which one of the following word is in the singular form?
1. Radius         3. Agenda
2. Oases           4. Formulae
• Identify the word in the plural form:-
1. Stadium       3. Radii
2. Physics         4. Agendum
• The plural form of the radius is-------
1. radii             3. radius
2. radi              4. Radius
• The plural form of ‘index’ is --------
1. indii             3. Indus
2. indices         4. Indexes
• Identify the word in the singular form:
1. Index           3. Agenda
2. Stadia          4. data
• What is the Plural form of the word is ‘louse’?
1. Louse        3. Licess
2. Lice           4. Lices

Answer:                                                                           

1. Becterium
2. Media
3. Radius
4. radii
5. radii
6. indices
7. Index
8. Lice