Yes, the word "air" is a noun or a verb.
The noun air is a word for the atmosphere, or the "air" or feel of a location.
The verb "to air" means to present or show, or to place in the air for cooling, freshening, or cleaning.
The noun 'oxygen' is an uncountable (mass) noun, a word for something that is indivisible into countable units.
Units of uncountable nouns are expressed by adjectives or a partitive noun (also called a noun counter).
The noun 'oxygen' takes a verb for singular unless quantified in the plural; for example:
Air is an uncountable noun and has no plural.
There is no plural - 'the air' means all the air.
Oxygen is both singular and plural. Unless you are talking about an oxygen molecule. That is singular.
is the word are singular or plural
Singular. Space is a singular entity.
Yes!
Plural
Singular
Singular Plural is caterpillars
The word crisis is singular. The plural form of crisis is crises.
Steroids is plural. The singular form of the word is steroid.
Association is singular. Associations is plural.
The word team is singular; the plural form is teams.
These is plural, this is singular
if a word refers to a single item it is singular. if it refers to lots of things it is plural."Potato" is singular "potatoes" is a plural word."mouse" is singular, "mice" is a plural word."person" is singular, "people" is a plural word.
Singular
The word 'she' is in singular form. The plural for 'she' would be 'they'.
"Have" may be singular or plural: I have; we have.
One alveolus is a singular, tiny air sac of the lung, surrounded by a network of capillaries, and through which oxygen and carbon dioxide are exchanged. A cluster of such air sacs are alveoli (plural of alveolus).
The word metastasis is singular, metastases is plural.
No, the word "list" is singular. The plural form of "list" is "lists."
Caveman is singular. Cavemen is plural.
Verbs cannot be singular or plural. Has is after singular nouns.
It's singular. The plural is cafeterias.