MEANING
A good exercise to demonstrate the variety of meaning through intonation changes is to take a single sentence, try stressing each word in turn, and see the totally different meanings that come out.
1. I didn't say he stole the money.
2. I didn't say he stole the money.
3. I didn't say he stole the money.
4. I didn't say he stole the money.
5. I didn't say he stole the money.
6. I didn't say he stole the money.
7. I didn't say he stole the money.
Once you are clear on the intonation changes in the seven sentences, you can add context words to clarify the meaning:
1. I didn't say he stole the money, someone else said it.
2. I didn't say he stole the money, that's not true at all.
3. I didn't say he stole the money, I only suggested the possibility.
4. I didn't say he stole the money, I think someone else took it.
5. I didn't say he stole the money, maybe he just borrowed it.
6. I didn't say he stole the money, but rather some other money.
7. I didn't say he stole the money, he may have taken some jewelry.