Kiwi asks…
Can I say the word "neither" only when I deny something? On the contrary, do I say "either" when I approve something?
Answer from a Native speaker

Rebecca
"Neither" means "none of." When using "neither," you indicate that none of the choices are what you want, are acceptable, etc. "Neither" has a negative connotation but isn't always used when denying something. Ex: Neither of the girls wanted to go swimming. => Both girls didn't want to go swimming Ex: Neither of us is going to the party. => We both are not going to the party "Either" is used when more than one option or choice is available. It isn't always used when you need to approve something. It just means that there are two choices available. Ex: You can either come with us or stay home. Ex: She will be going to either Rome or Paris to study. She hasn't decided yet.
Listening Quiz