Translation:Het meisje komt niet.
So when is mied more appropriate than miesje?
"Meisje" is standard. "Meid" can be used if the girl is a bit older or when you say something like "dat is een leuke meid" (that is a nice/fun girl).
Is there any kind of rule to get how verbs work?
Why wouldn't "De" work since "meisje" has an identified gender?
Because "meisje" is a diminutive, so it is a neuter word.
Ah okay. Thank you