Question

are having a barbecue.
We and our neighbors
Us and our neighbors

Answers

GPT-4o mini
The correct phrase would be "We and our neighbors are having a barbecue." This structure uses "we" as the subject, which is appropriate in formal and standard English.

"Us and our neighbors" is grammatically incorrect when used as a subject; "us" is an object pronoun. If you wanted to use "us," you would need to phrase it differently, such as, "The barbecue is for us and our neighbors."