Bark is singular.
Subject-verb agreement rules state that a subject must agree with its verb in number (singular or plural). For singular subjects, use singular verbs, and for plural subjects, use plural verbs. Examples: The cat runs fast. (singular) The dogs bark loudly. (plural) She writes a letter. (singular) They play soccer. (plural) The team is winning. (singular collective noun) In collective nouns, the verb can be singular or plural based on context, while indefinite pronouns like "everyone" or "nobody" always take singular verbs.
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)
The Algonquin Invented Birch bark canoes. (The plural of Algonquin is spelled the same way as the singular)
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'.