[TOEFL/Grammer] Make sentences correct (1)

• After turning the corner, a deer jumped out .... (X) -> 명확하지 않은 주어
  • After I had turned, a deer jumped out...
• She insisted on his apologize = She insisted that he apologize. (subjective)
• He suggested that she take a break. (subjunctive)
• Had I known about the meeting, I would have attended.
  
  • Had I known... -> empathizing