1. 1. Sentence level
1.1. Simple
1.2. Compound
1.3. Complex
1.4. Compound complex
1.5. Complex compound
2. 2. Clause level
2.1. Main clause
2.2. Subclause
2.3. Finite
2.4. Non-finite
2.5. Verbless
3. 3. Phrase level
3.1. NP
3.2. GenP
3.3. VP
3.4. PrepP
3.4.1. Preposition + prepositional compliment
3.5. AdjP
3.5.1. No determiners
3.6. AdvP
3.6.1. No determiners
4. 4. Word level
4.1. Open-class
4.1.1. Noun
4.1.1.1. Common noun
4.1.1.2. Proper noun
4.1.2. Verb
4.1.2.1. Lexical/main verbs
4.1.2.1.1. Phrasal verbs
4.1.2.1.2. Prepositional verbs
4.1.2.1.3. Phrasal-prepositional verbs
4.1.2.1.4. Copulas/linking verbs
4.1.2.2. Primary auxiliaries
4.1.2.2.1. Be, have, do
4.1.2.3. Modal auxiliaries
4.1.3. Adjective
4.1.3.1. Attributive
4.1.3.2. Predicative
4.1.4. Adverb
4.1.4.1. Interrogative adverbs
4.1.4.2. Adverb particles
4.2. Closed class
4.2.1. Determiners
4.2.1.1. Article (ook zero)
4.2.1.2. Possesive determiner
4.2.1.3. Demonstrative determiner
4.2.1.4. Interrogative determiner
4.2.1.5. Relative determiner
4.2.1.6. Quantifiers/indefinite determiner
4.2.1.7. Numeral
4.2.1.7.1. Cardinal
4.2.1.7.2. Ordinal
4.2.2. Pronouns
4.2.2.1. Personal pronoun
4.2.2.2. Possessive pronoun
4.2.2.3. Reflexive pronoun
4.2.2.4. Reciprocal pronoun
4.2.2.5. Demonstrative pronoun
4.2.2.6. Interrogative pronoun
4.2.2.7. Relative pronoun
4.2.2.8. Quantifier
4.2.3. Prepositions
4.2.3.1. Despite, apart from, except for
4.2.4. Particles
4.2.4.1. To-particle of the infinitive
4.2.4.2. Negator particle
4.2.4.3. Adverbial particles
4.2.5. Conjunctions
4.2.5.1. Coordinating conjunctions
4.2.5.2. Subordinating conjunctions
4.2.6. Interjections