The plural form of oil is oils.
The plural oil is oils.
Examples of nouns that are plural in form but singular in meaning:pajamaspoliticsnewsglassesbinocularsscissorspantsshortstrouserstongstweezersmathematicsspeciesclothescongratulationsmolassesmumpsphysicseconomicscivicsaerobaticsgymnasticsmeasles
The plural form of the noun patient is patients.The plural possessive form is patients'.Examples: The patients' waiting room is full.
The plural would be 'are', not 'is'.Examples- "The birds are soaring in the sky."- "Cats are quite docile creatures."
The plural form is mistresses.The plural possessive form is mistresses'.Examples: I put the mistresses' mail on her desk.
The plural form of the noun Chris is Chrises.The plural possessive form is Chrises'.Examples: The two Chrises' last names are Brown and Green.
The plural form of the noun audience is audiences.The plural possessive form is audiences'.Examples: All of his audiences' reactions are enthusiastic.
The plural form of the noun teammate is teammates.The plural possessive form is teammates'.Examples: My teammates' support helped me through my rehabilitation.
The plural form of the noun settlement is settlementsThe plural possessive form is settlements'.Examples: The early settlements' citizens had to build their own communities.
The plural form of the noun calf is calves.The plural possessive form is calves'.Examples: The calves' mothers were both owned by the same farmer.
The plural form of the noun Chris is Chrises.The plural possessive form is Chrises'.Examples: The two Chrises' last names are Brown and Green.