1. A few day ago, I went to the zoo with Chanmi and Mina.

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Why is 'the' used before 'zoo' in this sentence? Does 'the zoo' mean the specific zoo which both girls know? Or is zoo' in generic use?

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2. Mina said yes.
3. Mina said, "Yes."
4. Mina said in the affirmative.
(Are the three the same in meaning? Is #2 most commonly used?)

5. Mina said no.
6. Mina said, "No."
7. Mina said in the negative.
(Are the three the same in meaning? Is #5 the most common one?)

The phrase "the zoo" refers to a specific zoo that both girls know about. Frankly, I can't think of an instance in which "the" would not be used with "zoo" in this context.

4 and 7 are not used.

The other responses are fine.

1. The use of "the" before "zoo" in the sentence indicates that the speaker is referring to a specific zoo. It implies that both Chanmi and Mina are familiar with the zoo being talked about. Without the use of "the," it would imply a generic zoo or refer to any zoo in general.

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2. "Mina said yes" is a simple statement indicating that Mina responded affirmatively. It does not provide any additional information about the context or tone of Mina's response.

3. "Mina said, 'Yes.'" includes quotation marks to indicate direct speech. This is commonly used to represent exact words spoken by someone. The quotation marks emphasize that "yes" is the exact word spoken by Mina.

4. "Mina said in the affirmative" is a more formal way of expressing that Mina gave a positive response. It indicates that Mina's response was not just a simple "yes," but a more comprehensive affirmation.

These variations may have slightly different nuances, but they generally convey the same meaning. In everyday conversational usage, #2 ("Mina said yes") is the most common way to express a simple positive response.

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5. "Mina said no" is a straightforward statement indicating that Mina responded negatively. It does not provide any additional information about the context or tone of Mina's response.

6. "Mina said, 'No.'" includes quotation marks to indicate direct speech. This represents the exact words spoken by Mina and emphasizes that "no" is her exact response.

7. "Mina said in the negative" is a more formal way of expressing that Mina gave a negative response. It indicates that Mina's response was not just a simple "no," but a more comprehensive negative statement.

Similar to the previous set of examples, these variations generally convey the same meaning. In everyday conversational usage, #5 ("Mina said no") is the most common way to express a simple negative response.