Answer:
1. I could barely hear my baby brother crying for his bottle.
2. Giorgio didn't have any papers on his desk during the exam.
3. I heard her say that didn't do anything wrong.
4. Doris doesn't have anymore time to practice on her trumpet.
5. We had scarcely enough orange juice for the family at breakfast.
6. I looked for clues concerning his disappearance but didn't find any for several weeks.
7. "I don't want anymore trouble," the frustrated shopkeeper said at the meeting.
8. I haven't seen any marsupials, even on television.
9. My grandmother Sanchez hasn't left her beautiful homeland of Puerto Rico.
10. Soon-Yi doesn't have any easy answers to that complicated problem.
11. We don't need any education.
12. I can't get any satisfaction.
13. They can't run the required distance.
14. Harry doesn't have any reason to complain.
15. The seagulls do not resist the waste receptacles at the beach.
16. Our choir members can't hear the director's cue.
17. It really does not make any difference to them.
18. When we looked for disposable razors on the shelf in the drugstore, we found that there wasn't any.
19. Unfortunately, the search party hasn't found any of the missing airplane parts.
20. My mother couldn't locate any of the other web sites.
Explanation:
As was explained in the question, the usage of two negative words in the same sentence is a nonstandard form of writing or speaking the English Language. It is only allowed to use just one negative word at a time.
In the first sentence, for example, it was wrong for the speaker to use couldn't and barely in the same sentence. Only one of the two can be used at the same time. Therefore, the correct form eliminates couldn't with the positive could.