Reference: Mitchell P. Marcus, Mary Ann Marcinkiewicz, and Beatrice Santorini. 1993. Building a large annotated corpus of English: the penn treebank. Comput. Linguist. 19, 2 (June 1993), 313–330. Ref
| pos tag | description | example |
|---|---|---|
| CC | coordinating conjunction | and, or |
| CD | cardinal number | 3, third |
| DT | determiner | the, this |
| EX | existential there | there is |
| FW | foreign word | tabula |
| IN | preposition, subordinating conjunction | in, of, like |
| IN/that | that as subordinator | that |
| JJ | adjective | blue, happy |
| JJR | adjective, comparative | bluer, happier |
| JJS | adjective, superlative | bluest, happiest |
| LS | list marker | 1) |
| MD | modal | could, will |
| NN | noun, singular or mass | house |
| NNS | noun plural | houses |
| NP | proper noun, singular | Carrie |
| NPS | proper noun, plural | Americans |
| PDT | predeterminer | both as in “both the girls” |
| POS | possessive ending | person’s |
| PP | personal pronoun | I, she, it |
| PPZ | possessive pronoun | my, his, your |
| RB | adverb | however, usually, naturally, here, good |
| RBR | adverb, comparative | better |
| RBS | adverb, superlative | best |
| RP | particle | up as in “give up” |
| SENT | Sentence-break punctuation | . ! ? |
| SYM | Symbol | / [ = * |
| TO | infinitive ‘to’ | to play |
| UH | interjection | aha |
| VB | verb be, base form | be |
| VBD | verb be, past tense | was, were |
| VBG | verb be, gerund/present participle | being |
| VBN | verb be, past participle | been |
| VBP | verb be, sing. present, non-3d | am, are |
| VBZ | verb be, 3rd person sing. present | is |
| VH | verb have, base form | have |
| VHD | verb have, past tense | had |
| VHG | verb have, gerund/present participle | having |
| VHN | verb have, past participle | had |
| VHP | verb have, sing. present, non-3d | have |
| VHZ | verb have, 3rd person sing. present | has |
| VV | verb, base form | take |
| VVD | verb, past tense | took |
| VVG | verb, gerund/present participle | taking |
| VVN | verb, past participle | taken |
| VVP | verb, sing. present, non-3d | take |
| VVZ | verb, 3rd person sing. present | takes |
| WDT | wh-determiner | which, who |
| WP | wh-pronoun | who, what |
| WP$ | possessive wh-pronoun | whose |
| WRB | wh-abverb | where, when |
| # | # | # |
| $ | $ | $ |
| “ | Quotation marks | ‘ “ |
| `` | Opening quotation marks | ‘ “ |
| ( | Opening brackets | ( { |
| ) | Closing brackets | ) } |
| , | Comma | , |
| : | Punctuation | – ; : — … |
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