Word classes

Content words
A content word is a word that displays meaning (Team, Italy, Dining, Hotel)
Open word classes
Refers to the category of content words, the number of them can expand  (Nouns, verbs, adjectives, and adverbs)
Closed word classes
Made up of a finite set of words (prepositions, determiners and conjunctions)
Common noun
Any person, place or thing (student, teacher, college)
Abstract nouns
An abstract noun is a noun that you cannot sense, no physical existence, emotions, ideas (love, power, truth, joy)
Proper noun
The name of a particular person, place or thing (Julie, Mr Smith, London)
Collective noun
Name of a group of people or things all of one type (government, staff, team)
Verbs
An action state or occurrence (be, drive, grow, sing, think, walk)
Adjective
Naming an attribute/description of a noun (sweet, red, big, talented, tidy)
Adverb
How an action is done, modifies the verb, shows relationship to previous sentence (happily, recently, luckily, soon)
Pronoun
Stands in place of a noun (I, me, you, they, them, ours, theirs, this, that)
Prepositions
Links noun to rest of sentence, preposition +verb = phrasal verb (In, on, over, under, along, at, with)
Determiners
Determine the noun ( A dog, my dog, this dog, the dog)
Conjunctions
Connecting clauses (and, if, but, or, because, although)
Auxiliaries
(was, don't, might, do, does, did, have, has, had, am, am, is, was, were)
Modal auxiliaries
Outcome, ability, or permission (must, may, might, can, could, will, would)