1. i didn't eat applea or pears.

2. i didn't eat applea and pears.
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#1 mean "I didn't eat apples. I didn't eat eat pears, either." Am I right? Then, what about #2? What does #2 mean in the following three sentences? Or would you paraphrase #2 in detatil?(Thank you for your help.)

3. I didn't eat both apples and pears.
4. I didn't eat apples. I didn't eat pears, either.
5. I ate apples, but I didn't eat pears.
Or I didn't eat apples, but I ate pears.

All of these are correct except #3. The word "both" is redundant (unnecessary). "apples and pears" means both without the word "both".

You are correct with your interpretation of sentence #1. It means "I didn't eat apples. I didn't eat pears either."

Now let's break down sentence #2 and its possible interpretations:

1. "I didn't eat apples and pears." This sentence means that the person didn't eat both apples and pears, implying that they didn't eat a combination of both fruits.

As for the additional sentences you provided:

3. "I didn't eat both apples and pears." This sentence has a similar meaning to sentence #2. It emphasizes that the person didn't eat a combination of both fruits.

4. "I didn't eat apples. I didn't eat pears, either." This sentence is similar to sentence #1 in terms of meaning. It indicates that the person didn't eat apples and didn't eat pears separately.

5. "I ate apples, but I didn't eat pears." This sentence suggests that the person did eat apples, but they specifically didn't eat pears.

Alternatively, "I didn't eat apples, but I ate pears" would mean that the person didn't eat apples but did eat pears.

Please note that the exact meaning of a sentence can depend on the context in which it is used.

You are correct about the interpretation of sentence #1: "I didn't eat apples. I didn't eat pears, either." Now, let's discuss sentence #2 and its variations.

Sentence #2: "I didn't eat apples and pears."

This sentence implies that the person didn't eat a combination of apples and pears together. In other words, they didn't eat both apples and pears at the same time. However, it does not specify if they ate either apples or pears separately.

To clarify the meaning, let's compare it with the other variations:

3. "I didn't eat both apples and pears."
This sentence emphasizes that the person did not eat apples and pears as a pair or at the same time. It suggests that they might have eaten only one of the two fruits or neither of them.

4. "I didn't eat apples. I didn't eat pears, either."
This sentence clearly states that the person did not eat apples or pears. It means they didn't consume either fruit separately.

5. "I ate apples, but I didn't eat pears."
6. "I didn't eat apples, but I ate pears."

Both sentences imply that the person ate apples but did not consume pears. However, the phrasing differs depending on whether the emphasis is on eating apples or not eating pears.

In summary, the second sentence (#2) suggests that the person did not eat a combination of apples and pears together, but it does not mention whether they ate either fruit separately.