To change the given sentences into the past perfect tense, we need to use the auxiliary verb "had" followed by the past participle form of the main verb. Here are the revised sentences:
1. The boy had taken the money.
2. I had waited for them.
3. We had gone to the market.
4. She had not answered the phone.
5. He had made no attempt to escape.
In each sentence, we have added "had" before the main verb to indicate that the action occurred before another past event or time reference. The use of the past perfect tense helps to establish a clear sequence of events in the past.