Sentence structure

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Across
  1. 2. sentence with un reasonable comma
  2. 4. uncomplete sentence
  3. 6. a sentence with two or more independent clauses
  4. 7. what the theme of this crossword is
Down
  1. 1. two independent clauses one dependent
  2. 3. "She enjoys reading"
  3. 5. sentence without proper punctuation