Their function is to name people, places and things, qualities, ideas, or activities. Also to act as a subject or object of the verb.
Nouns (e.g. countable ,uncountable)
10
Their function is to show an action, state or experience
Verbs (e.g. transitive, intransitive)
15
Their function is to describe or give more information about a noun, pronoun or part of a sentence.
Adjectives
15
Their function is to describe or give more information about how, when or where something happens. Also to add more information to adjectives, verbs or other adverbs or sentences.
Adverbs ( e.g. of degree, manner, time)
20
Their function is to connect a noun, a noun phrase or pronoun to another word or phrase.
Prepositions (e.g. of time, place or direction)
15
Their function is to replace or refer to a noun, or noun phrase just mentioned or known.