1. He found me the key.
2. I was found the key by him.
3. The key was found for me by him.
4. The key was found me by him.
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Is #2 grammatical?
Is #4 grammatical without 'for'?
5. He left me a big house.
6. I was left a big house by him.
7. A big house was left for me by him.
8. A big house was left me by him.
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Is #6 grammatical?
Is #8 grammatical without 'for'?
1. He found the key for me. <~~rephrased
2. I was found the key by him. <~~no
3. The key was found for me by him. <~~OK
4. The key was found me by him. <~~no
5. He left me a big house. <~~OK
6. I was left a big house by him. <~~OK
7. A big house was left for me by him. <~~OK
8. A big house was left me by him. <~~no