POS Tagger

Original Pennbank tags

POS Tag Description Example
CC coordinating conjunction and
CD cardinal number 1, third
DT determiner the
EX existential there there is
FW foreign word d'hoevre
IN preposition/subordinating conjunction in, of, like
JJ adjective green
JJR adjective, comparative greener
JJS adjective, superlative greenest
LS list marker 1)
MD modal could, will
NN noun, singular or mass table
NNS noun plural tables
NNP proper noun, singular John
NNPS proper noun, plural Vikings
PDT predeterminer both the boys
POS possessive ending friend's
PRP personal pronoun I, he, it
PRP$ possessive pronoun my, his
RB adverb however, usually, naturally, here, good
RBR adverb, comparative better
RBS adverb, superlative best
RP particle give up
TO to to go, to him
UH interjection uhhuhhuhh
VB verb, base form take
VBD verb, past tense took
VBG verb, gerund/present participle taking
VBN verb, past participle taken
VBP verb, sing. present, non-3d take
VBZ verb, 3rd person sing. present takes
WDT wh-determiner which
WP wh-pronoun who, what
WP$ possessive wh-pronoun whose
WRB wh-abverb where, when

My own tags

POS Tag Description Example
PRP0BJ personal pronoun OBJECT me, him, themselves
NP3ND part/end of noun phrase in IS/ARE... questions Why are the men/NP3ND in the fields?


The original pos-tagger was pretty good, but it proved to be terrible when it came to questions, mainly because of the change in word order.

I use this pos-tagger for my Reported Speech Converter, so I'm really only concerned with identifying the VERBS in the phrase and whether YOU is an object or a subject pronoun.

Initial tagging:

Final tagging: