1. lexical ( content)
1.1. noun
1.1.1. proper
1.1.1.1. singular; often w/o determiner
1.1.1.2. with "the"
1.1.2. common
1.1.2.1. types
1.1.2.1.1. concrete
1.1.2.1.2. abstract
1.1.2.2. countability
1.1.2.2.1. uncountable
1.1.2.2.2. countable
1.1.3. package ( i guess not very important)
1.2. verb
1.2.1. meaning
1.2.1.1. activity
1.2.1.1.1. intransitive
1.2.1.1.2. transitive
1.2.1.2. communication
1.2.1.3. mental
1.2.1.4. causative
1.2.1.5. occurrence
1.2.1.6. existence or relationship
1.2.1.7. aspect or stage of progress
1.2.2. valency pattern
1.2.2.1. intransitive
1.2.2.2. transitive
1.2.2.2.1. mono
1.2.2.2.2. di
1.2.2.2.3. complex
1.2.2.3. copular
1.2.2.3.1. sensory
1.2.2.3.2. existence
1.2.2.3.3. result
1.2.3. multi-word verb
1.2.3.1. phrasal verb
1.2.3.1.1. verb + adverbial particle
1.2.3.2. phrasal prepositional verb
1.2.3.2.1. monotransitive
1.2.3.3. prepositional verb
1.2.3.3.1. monotransitive
1.2.3.3.2. answer who or what
1.2.3.4. free combination
1.2.3.4.1. textbook pg134
1.2.3.4.2. slide snippet
1.3. adjective
1.4. adverb
2. function
2.1. determiner
2.1.1. article
2.1.1.1. definite
2.1.1.2. indefinite
2.1.2. demonstrative
2.1.3. possessive
2.1.4. quantifier
2.1.5. wh-word
2.1.6. numeral
2.2. pronoun
2.2.1. personal
2.2.2. demonstrative
2.2.3. reflexive
2.2.4. reciprocal
2.2.5. possessive
2.2.6. indefinite
2.2.7. relative
2.2.8. interrogative
2.3. auxiliary verb ( can function as auxiliary and main verb)
2.3.1. modal auxiliary
2.3.1.1. will / would
2.3.1.2. can / could
2.3.1.3. shall / should
2.3.1.4. may
2.3.1.5. must
2.3.2. primary auxiliary
2.3.2.1. be
2.3.2.2. have
2.3.2.3. do
2.4. preposition / complex preposition
2.5. adverbial particles
2.6. coordinator
2.6.1. correlative
2.6.2. one word
2.7. subordinator
2.7.1. one word
2.7.2. complex
2.8. wh-word
2.9. single word class
2.9.1. existential there
2.9.2. negator not
2.9.3. infinitive marker to
2.10. numeral
2.10.1. cardinal
2.10.2. ordinal