Posted by rfvv on Wednesday, May 11, 2016 at 7:11pm.
1. Don't eat food if the expiration date has passed.
2. Don't eat food whose expiration date has passed.
3. Don't eat the food whose expiration date has passed.
4. Don't eat spoiled food whose expiration date has passed.
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Which ones are good to use?
I'd use 1 and 2.
3 is okay, but with an unneeded "the" in it.
4 seems redundant. Since "expiration date has passed" implies the food is not good, "spoiled food" is not needed.