You can use a question tag (see our grammar page here) to get the other person to agree with you, or to confirm what you have said.
For example, in “It’s hot today, isn’t it”, the “isn’t it” is a tag question, and its purpose is to get the other person to agree, that it is hot.
In this type of tag question, your voice should fall (rather than rise) at the end. Stress the auxiliary (for example “isn’t”) to make your voice fall.
This is an example of a tag question being used to check someone’s name.
Here’s an example of a negative tag question, using the auxiliary “do”.
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