There’s one thing I’m confused about the use of singular they/them for a non-binary person. Is it:
- "Jake is my friend, and they are great."
- "Jake are my friend, and they are great."
The former sounds correct to me, but I don’t know where to find confirmation that it is.
Singular "they" works in exactly the same way when used to refer to a nonbinary person as it does when used to refer to a person of unknown gender. In other words, "they" is used with plural verbs like "are", "have", etc, but "is" is used elsewhere:
If anyone has lost their wallet, they are advised to notify reception.
The rule isn’t specific to nonbinary people. The scope of plural agreement is limited to the pronoun "they" (as well as to actual plurals, and so on).
So the correct sentence is:
Jake is my friend, and they are great.