Looks like no one added any tags here yet for you.
singular subject
an ecologist studies nature.
the boy learns about ecology.
plural subject
ecologists study nature.
the boys learn about ecology.
prepostitional phrase
the desert, except in polar regions, becomes very hot.
desert - subject
becomes - verb
inverted sentence
in the desert roam herds of camels.
roam - verb
herds - subject
never the subject
here or there (adverb - where something is)
ex. a high mountain is there near the desert.
collective nouns and special subjects - singular
the team agrees to save papers.
team - subject
agrees - verb
mathematics, physics, economics, athletics, and news end in -s but are singular
collective nouns and special subjects - plural
the team agrees to save papers.
trousers, pliers, and scissors name one thing, but take a plural verb.
collective rules
refer to a single unit - singular
number of individual units - plural
ex. ten years seems a long time. (singular)
a title of a book or work of art….
is considered singular even if a noun within the title Is plural.
ex. recycling successes is not a best-selling book.
indefinite pronouns as subjects
plural - few others many, both several
singular - all, most, any, none, some
agreement compound subjects
when the simple subjects are joined by the coordination conjunction ‘and’ or by the correlative conjunction ‘both…and’, object is singular.
exception - when ‘and’ is used to join 2 words that are apart of one or refer to a single person/thing