Markup symbols:

1
Markup symbols
mismatch singular/plural, tense, gender
nonparallel construction
spelling or punctuation error
awkward construction excised text
simpler expression preferred
word order NAS not a sentence
2
Most common errors

• Incomplete sentences
• Spelling, e.g., its versus it's
• Loose prose We provided a demonstration in the
  use of violence in video games. We demonstrated
  video game violence.
• Thing ...
• Chains of prepositional phrases He chased the
  wealth of the gold of the girl in the game. In
  the game, he chased the girl's golden wealth.
• Match singulars and plurals
• The comma...
• Parenthesized side remarks
• Repetition The objective is to minimize the
  execution time. This objective can be obtained
  by applying Newton's Iteration Algorithm. This
  goal follows from Newton's Iteration Algorithm.
• Active versus passive voice
• Parallel constructions The benefits are saving
  money, your workers are kept busy, and
  the authorities will never know of your
  activities. The benefits are saving money,
  keeping your workers busy, and avoiding attentio
  n.