These are the tags used in the Penn Treebank.
| Tag |
Part of speech
|
| CC |
Coordinating conjunction
|
| CD |
Cardinal number
|
| DT |
Determiner
|
| EX |
Existential there
|
| FW |
Foreign word
|
| IN |
Preposition or subordinating conjunction
|
| JJ |
Adjective
|
| JJR |
Adjective (comparative)
|
| JJS |
Adjective (superlative)
|
| LS |
List item marker
|
| MD |
Modal
|
| NN |
Noun (singular or mass)
|
| NNS |
Noun (plural)
|
| NNP |
Proper noun (singular)
|
| NNPS |
Proper noun (plural)
|
| PDT |
Predeterminer
|
| POS |
Possessive ending
|
| PRP |
Personal pronoun
|
| PRP$ |
Possessive pronoun
|
| RB |
Adverb
|
| RBR |
Adverb (comparative)
|
| RBS |
Adverb (superlative)
|
| RP |
Particle
|
| SYM |
Symbol
|
| TO |
to
|
| VB |
Verb (base form)
|
| VBD |
Verb (past tense)
|
| VBG |
Verb (gerund or present participle)
|
| VBN |
Verb (past participle)
|
| VBP |
Verb (non-3rd person singular present)
|
| VBZ |
Verb (3rd person singular present)
|
| WDT |
Wh-determiner
|
| WP |
Wh-pronoun
|
| WP$ |
Possessive wh-pronoun
|
| WRB |
Wh-adverb
|
| Tag |
Part of speech
|
| ADJP |
Adjective Phrase
|
| ADVP |
Adverb Phrase
|
| CONJP |
Conjunction Phrase
|
| FRAG |
Fragment
|
| INTJ |
Interjection
|
| LST |
List marker
|
| NAC |
Not a Constituent
|
| NP |
Noun Phrase
|
| NX |
marks the head of the NP
|
| PP |
Prepositional Phrase
|
| PRN |
Parenthetical
|
| PRT |
Particle
|
| QP |
Quantifier Phrase
|
| RRC |
Reduced Relative Clause
|
| UCP |
Unlike Coordinated Phrase
|
| VP |
Verb Phrase
|
| WHADJP |
Wh-adjective Phrase
|
| WHAVP |
Wh-adverb Phrase
|
| WHNP |
Wh-noun Phrase
|
| WHPP |
Wh-prepositional Phrase
|
| X |
Unknown, uncertain, or unbracketable
|
| Tag |
Clause
|
| S |
Simple declarative clause
|
| SBAR |
Clause introduced by a (possibly empty) subordinating conjunction
|
| SBARQ |
Direct question introduced by a wh-word or a wh-phrase
|
| SINV |
Inverted declarative sentence
|
| SQ |
Inverted yes/no question, or main clause of a wh-question, following the wh-phrase in SBARQ
|
