95%
Leo said: "If I had known that the yogurt was expired, I wouldn't have eaten it."
- In the indirect speech of conditional sentence type 3, the structure in the main clause should remain the same. The past simple part the yogurt was expired should be changed into past perfect.
- The conditional sentence type 3 remains the same in the reported speech.
- In the indirect speech of conditional sentences type 3, the past perfect tense in the If clause and the would + have + past participle structure remain the same.