S -> NP VP
S -> VP
VP -> V ADVERBPHRASE
VP -> V NP
VP -> V NP ADVERBPHRASE
NP -> N
NP -> DET N
NP -> N N
ADVERBPHRASE -> ADVERB NP
N -> time
V -> time
N -> flies
V -> flies
V -> like
ADVERB -> like
DET -> an
N -> arrow