如何在给定POS标签的NLTK中结合动词？

Question

给定POS标签,例如VBD,如何将动词与NLTK匹配？

例如

VERB: go
POS: VBD
RESULT: went

Answer 1

NLTK目前不提供变形.Pattern-en和nodebox做结合.

有时,pattern-en网站中的示例无法正常工作.这对我有用:

>>> from pattern.en import conjugate
>>> verb = "go"
>>> conjugate(verb, 
...     tense = "past",           # INFINITIVE, PRESENT, PAST, FUTURE
...    person = 3,                # 1, 2, 3 or None
...    number = "singular",       # SG, PL
...      mood = "indicative",     # INDICATIVE, IMPERATIVE, CONDITIONAL, SUBJUNCTIVE
...    aspect = "imperfective",   # IMPERFECTIVE, PERFECTIVE, PROGRESSIVE 
...   negated = False)            # True or False
u'went'
>>> 

注意

conjugate当时态不需要辅助动词时,似乎只输出.例如,在西班牙语中,ir的(单数第一人称)未来是iré.在英语中,go的未来是由辅助意志和不定式去形成的,导致将去.在下面的代码,IRE输出,但不是会去.

>>> from pattern.es import conjugate as conjugate_es
>>> verb = "ir"
>>> conjugate_es(verb, tense = "future")
u'ir\xe1'
>>> from pattern.en import conjugate as conjugate_en
>>> verb = "go"
>>> conjugate_en(verb, tense = "future")
>>>