penny is singular
pennies is plural
Addendum is singular. Addenda or addendums is plural.
The singular of pennies is penny. As in "I found a penny on the floor".
Analysis is the singular, analyses is the plural.
The noun 'sharpener' is singular, a word for one.The plural noun is 'sharpeners'.
Verbs cannot be singular or plural. Requires is after singular nouns.
Pence (UK) and pennies (US) are the plural forms for the singular noun penny.
The singular possessive of penny is penny's, as in "penny's worth".
practitioner is singular (plural practitioners)sofa is singular (plural sofas)satellite is singular (plural satellites)clips is plural (singular clip)dentist is singular (plural dentists)dollars is plural (singular dollar)article is singular (plural articles)magazines is plural (singular magazine)laminator is singular (laminators is plural)radios is plural (singular radio)
singular and plural
Singular: book / Plural: books Singular: cat / Plural: cats Singular: child / Plural: children Singular: foot / Plural: feet
Are is plural. "Is" is singular. For example, "There is a glove on the chair". That is singular. "There are gloves on the chair". That is plural.
"Has" is singular, e.g. He has, she has. "Have" is plural, e.g. They have, we have. The exception is "I" - e.g. I have.
The word team is singular; the plural form is teams.
Who may be singular or plural.
This is singular. These is the plural form.
These is plural, this is singular
'These' is the plural form of 'this'.