Q1: Why don't we have "to" before the verb "dine" in the following example? Is it because it borrows it from "to come"?
Q2: Is adding "to" before "dine" considered as wrong?
Example (1): Whenever he feels lonely, he invites a neighbour to come and dine with him.
In case the sentence is written in the following manner:
Example (2): Whenever he feels lonely, he invites a neighbour to dine with him.
I think we should keep the "to" since it follows the pattern:
[Verb + object + to + infinitive] Isn't it?