1) When I operated on my right knee, I was afraid of death. <br/><br/><br/>It is said the above sentence is flawed and the correct one is the folllowing one: <br/><br/>2) When I had my right knee operated on, I was afraid I might die. <br/><br/>What is wrong with the first sentence? Some years ago I underwent knee surgery. I ran a lot for years and gave up after the surgery. <br/><br/>What is wrong with the first sentence+