grammar4

# b d

# Symbols in the grammar are case-sensitive.
#
# This grammar uses a convention that
#    - terminals are lowercase          (president)
#    - preterminals are capitalized     (Noun)
#    - other nonterminals are all-caps  (NP)
#
# This convention just makes grammars more readable to humans.  Thus:
#
#    - When *you* are writing grammars, you should
#      follow this convention unless you have a good reason not to.
#
#    - But the  *program* should still work with grammars that don't
#      follow this convention.  So how can the program reliably tell
#      the difference between terminal and nonterminal symbols?  If
#      there is at least one rule for rewriting a symbol, then that
#      symbol is a nonterminal and should be rewritten.
#######################

# Rules for creating full sentences.

1	ROOT	S .
1	ROOT	S !
1	ROOT	is it true that S ?     # mixing terminals and nonterminals is ok.

# The basic grammar rules.  Here's what the abbreviations stand for:
#    S  = sentence
#    NP = noun phrase
#    VP = verb phrase
#    PP = prepositional phrase
#    Det = determiner (sometimes called "article")
#    Prep = preposition
#    Adj = adjective
#    Nnp = proper noun
#    Conj = conjunction
#    Adv = adverb
#    Prp = personal pronoun
#    ADVP = adverbial phrase
#    Vbz = verb 3rd person singular present form
#    SubC = subordinating conjunction


#################
#  Basic rules  #
#################

1   S   S_PAST          # to generate sentences in Past Simple tense
1   S   S_PRESENT       # to generate sentences in Present Progressive tense

1   S_PAST  NP VP_PAST
1   S_PRESENT   NP VP_PRES

1   VP_PAST Vpast_trans NP
5   NP  Det Noun

0.3 NP  Det Noun PP     # changed from NP -> NP PP to NP -> Det Noun PP to prevent "Sally with the pickle"
0.2 PP  Prep NP

1   Noun    Adj Noun


####################
#  grammar2 rules  #
####################

5   NP  Nnp         # to support sent (a) - "Sally ate a sandwich ."

0.3 NP  NP Conj NP                                  # to support sent (b) - "Sally and the president"
0.3 Vpast_trans Vpast_trans Conj Vpast_trans       # to support sent (b) - "wanted and ate"

0.1 S   S Conj S        # a conjunction can also connect sentences

1   VP_PAST Vpast_intrans       # to support sent (c) - "the president sighed ."

1   SBAR    SubC S_PAST
0.5 VP_PAST Vpast_that SBAR     # to support sent (d) - "the president thought that a sandwich sighed ."

0.4 S_PAST  Prp Vpast_np_that NP SBAR   # to support sent (e) - "it perplexed the president that a sandwich ate Sally ."

1   ADVP    Adv
1   ADVP    Adv ADVP        # adverbial phrase
1   ADJP    Adj
1   ADJP    ADVP Adj        # adjectival phrase

1   NP  Det ADJP Noun           # to support sent (f) - "the very very very perplexed president ate a sandwich ."
0.2 NP  Det ADJP Noun PP        # extra - to support "the very very very perplexed sandwich on the desk ... "

1   VP_PAST Vpast_prep PP       # to support sent (g) - "the president worked on every proposal on the desk ."

1   VP_PRES Vbz ADJP                # to support sent (h) - "Sally is lazy ."
1   VP_PRES Vbz ADJP Conj ADJP      # extra - to support "Sally is very lazy and very fine ."

1   VP_PRES Vbz Vpresent NP         # to support sent (i) - "Sally is eating a sandwich ."

1   VP_PRES Vbz NP          # extra - to support "sally is a sandwich ."
1   VP_PAST Vbz NP          # to support sent (j) - "the president thought that sally is a sandwich ."


####################
#  grammar4 rules  #
####################

# --------------------- Yes-No Questions Rules --------------------- #

1   ROOT    YNQ ?       # generating yes/no questions

3   YNQ YNQ_DID_WILL        # generating questions in Past Simple and Future Simple tenses
1   YNQ YNQ_IS              # generating questions in Present Progressive tense

3   YNQ_DID_WILL    Aux NP VPQ
0.3 YNQ_DID_WILL    Aux Prp Vbase_np_that NP SBAR     # "did it perplex the president that ... ?"

1   YNQ_IS  Vbz NP NP                   # "is Sally a sandwich ?"
1   YNQ_IS  Vbz NP ADJP                 # "is Sally (very) funny ?"
0.3 YNQ_IS  Vbz NP ADJP Conj ADJP       # "is Sally (very) funny and (very) cynical ?"
1   YNQ_IS  Vbz NP Vpresent NP          # "is Sally eating the sandwich ?"

1   VPQ Vbase_trans NP      # "did Sally ___ (and ___) the sandwich ?"  # "where did Sally ___ (and ___) the sandwich ?"
1   VPQ Vbase_prep PP       # "did Sally ___ on the desk ?"             # "where did Sally ___  on the desk ?"
0.5 VPQ Vbase_that SBAR     # "did Sally ___ that ... ?"                # "where did Sally ___ that ... ?"
3   VPQ Vbase_intrans       # "did Sally ___ ?"                         # "where did Sally ___ ?"

1   Vbase_trans Vbase_trans Conj Vbase_trans

# -------------------- WH-word Questions Rules -------------------- #

1   ROOT    WHQ ?       # generating WH questions

# 'Where' questions
5   WHQ where YNQ_DID_WILL
1   WHQ where Vbz NP                # "where is phoebe ?"
1   WHQ where Vbz NP Vpresent NP    # "where is phoebe eating the sandwich ?"

# 'What' questions
4   WHQ what Aux NP VPQ1
1   WHQ what Vbz NP Vpresent    # "what is chandler eating ?"
1   WHQ what Vbz NP             # "what is a sandwich ?"

# 'Who' questions
3   WHQ who Aux NP Vbase_prep with      # "who did the president ___ with ?"
3   WHQ who Aux NP Vbase_trans          # "who did the president ___ ?"
3   WHQ who VPQ2
1   WHQ who Vbz Vpresent NP             # "who is eating a sandwich ?"
1   WHQ who Vbz ADJP                    # "who is (very) cynical ?"
1   WHQ who Vbz ADJP Conj ADJP          # "who is (very) funny and (very) cynical ?"
1   WHQ who Vbz NP

1   VPQ1    Vbase_trans NP with                 # "what did Sally ___ the sandwich with ?"
1   VPQ1    Vbase_trans                         # "what did Sally ___ ?"
1   VPQ1    Vbase_that                          # "what did the president think/understand ?"
1   VPQ1    Vbase_that SubC NP Vpast_trans      # "what did the president ___ that Sally ___ ?"
1   VPQ1    Vbase_prep Prep                     # "what did the president ___ on ?"

1   VPQ2    Vpast_trans NP      # "who ___ (and ___) the sandwich ?"
1   VPQ2    Vpast_prep PP       # "who ___ on the desk ?"
1   VPQ2    Vpast_that SBAR     # "who thought/understood that ... ?"
1   VPQ2    Vpast_intrans       # "who ___ ?"


# *=**=*=*=*=*=*=* Extended vocabulary for grammar4 *=**=*=*=*=*=*=* #

1   Aux did
1   Aux will

# Present tense (Present Simple) -  transitive verbs  * Plural *
1   Vbase_trans eat
1   Vbase_trans want
1   Vbase_trans kiss
1   Vbase_trans understand
1   Vbase_trans pickle
1   Vbase_trans perplex
2   Vbase_trans hug     #NEW
2   Vbase_trans buy     #NEW

# Present tense (Present Simple) - verbs followed by preposition  * Plural *
1   Vbase_prep  work
1   Vbase_prep  eat
1   Vbase_prep  sigh
3   Vbase_prep  play    #NEW

# Present tense (Present Simple) - verbs followed by 'that'  * Plural *
1   Vbase_that  think
1   Vbase_that  understand

# Present tense (Present Simple) -  intransitive verbs  * Plural *
1   Vbase_intrans   sigh
1   Vbase_intrans   eat
3   Vbase_intrans   work
1   Vbase_intrans   laugh     #NEW
1   Vbase_intrans   smile     #NEW

# Present tense (Present Simple) - verb that needs to be followed by one object and the verb's cause  * Plural *
1   Vbase_np_that   perplex


#########################
#  Original Vocabulary  #
#########################

# Vocabulary.  Your program can see that "ate" is a terminal
# symbol because there exists no rule for rewriting it.
# Any symbol that can rewrite as a terminal (or a string of
# terminals, like "chief of staff") is called a "preterminal."  Notice
# that a preterminal is a special kind of nonterminal.

# Past tense (Past Simple) - intransitive verbs
1   Vpast_intrans   sighed
1   Vpast_intrans   ate
1   Vpast_intrans   worked
3   Vpast_intrans   laughed     #NEW
3   Vpast_intrans   smiled      #NEW

# Past tense (Past Simple) - transitive verbs
1   Vpast_trans ate
1	Vpast_trans wanted
2	Vpast_trans kissed
1   Vpast_trans understood
1   Vpast_trans pickled
1   Vpast_trans perplexed
2   Vpast_trans hugged      #NEW
2   Vpast_trans bought      #NEW

# Past tense (Past Simple) - verbs followed by preposition
1   Vpast_prep  worked
1   Vpast_prep  ate
1   Vpast_prep  sighed
3   Vpast_prep  played      #NEW

# Past tense (Past Simple) - verbs followed by 'that'
2   Vpast_that  thought
1   Vpast_that  understood

# Past tense (Past Simple) - verb that needs to be followed by one object and the verb's cause
1   Vpast_np_that perplexed

# Present tense (Present Progressive)
1   Vpresent    eating
1   Vpresent    hugging
1   Vpresent    kissing

1	Det	the
1	Det	a
1	Det	every

1   Nnp sally
5   Nnp ross        #NEW
5   Nnp chandler    #NEW
5   Nnp rachel      #NEW
5   Nnp monica      #NEW
5   Nnp joey        #NEW
5   Nnp phoebe      #NEW

1	Noun	president
1	Noun	sandwich
1	Noun	pickle
1	Noun	chief of staff
1	Noun	floor
1   Noun    proposal
1   Noun    desk
1   Noun    doctor  #NEW
1   Noun    pizza   #NEW

1   Adv very

1	Adj	fine
1	Adj	delicious
1	Adj	perplexed
1	Adj	pickled
1   Adj lazy
2   Adj funny       #NEW
2   Adj loyal       #NEW
2   Adj cynical     #NEW

1	Prep	with
1	Prep	on
1	Prep	under
1	Prep	in

1   SubC    that

1   Prp it

1   Vbz is

1   Conj    and