Here are some common passive sentences that everyone use. We all like to increase word count, but these are completely useless. You can see how the pacing is greatly impacted.
Bad: It seemed to have gone the other way. Good: It went the other way.
Bad: It had been sitting there. Good: It sat there.
Bad: He could not have been waiting for more than a few minutes. Good: He only waited for a few minutes.
Bad: I began to move slowly. Good: I moved slowly.
Bad: There had not been any phone calls. Good: Nobody called.
Bad: He had had the feeling of lust which seemed to be within him. Good: He was horny.