Cupful is singular; cupfuls is the plural.
cupfuls
The plural form of cupful is cupfuls.
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.
Who may be singular or plural.
diagnosis is singular diagnoses is plural sis = singular ses = plural
Cupful's
Cupfuls
cupsful
The word cupful is a singular, common noun, a word for a thing.
cupfuls
cupfulls
The plural form of cupful is cupfuls.
Cupful is the singular form. It indicates a single full cup of something, often a food ingredient. Cupfuls is the plural, according to The Perrin-Smith Handbook of Current English, page 349. More than one full cup of something is referred to as cupfuls, as in two cupfuls of flour.
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.