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  1. rx <- '(?:\\s+|^)(?:can|could|may|might|shall|should|will|would|need)(\\s+[[:alpha:]])'
  2. verb <- c('I can help you.', 'We shall not stop here!')
  3. gsub(rx, '\\1', verb)
Success #stdin #stdout 0.24s 39252KB
comments (?)
stdin 
Standard input is empty
stdout 
[1] "I help you."       "We not stop here!"
https://ideone.com/QD98dS
language:
R (R 3.5.2)
created:
4 years ago
visibility:
secret

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