In this case it actually doesn't matter that one of the nouns is a collective noun. Since the question inquires about more than one person, the correct verb form would be "are."
Other similar examples:
Are your brother and sister coming to dinner?
Are your neighbor and his children coming to dinner?
Are your coach and soccer team coming to dinner?
A handy way to test for correct grammar is to turn the question into a statement:
Your family and best friend are coming to dinner.
[and not]
Your family and best friend is coming to dinner. (wrong!)
Another useful test is to use a pronoun to reduce the sentence to its simplest form:
Are they coming to dinner?
[and not]
Is they coming to dinner? (wrong!)
No. You would say: Are your family ...
However you say it this does not sound very good. It would be better to split it into two separate questions.
Yes, family is used as a collective noun, for example a family of five, a family of actors, a family of gophers, etc.
There are no collective nouns in the sentence. The noun 'family' can be used as a collective noun (a family of artists or a family of gophers), but in this sentence it is not.
Family
No, grandparents is a common plural noun. Appropriate collective nouns might be family or clan. Grandparents are members of a family or clan.
The collective nouns area colony of beaversa lodge of beaversa family of beavers.
Family - 2008 Guess Who's Coming to Dinner Part 1 1-11 was released on: USA: 5 April 2009
Yes, family is used as a collective noun, for example a family of five, a family of actors, a family of gophers, etc.
Culture is ordinary
Family is a collective noun , referring to a basic family unit of parents and children
There are no collective nouns in the sentence. The noun 'family' can be used as a collective noun (a family of artists or a family of gophers), but in this sentence it is not.
Yes, the noun family is a collective noun for a family of otters, a family of sardines, a family of beavers, a family of friends, or a family of any other type.
There is no tradition of a family dinner on Hanukkah. The family eats dinner every night during Hanukkah, according to their routine.
The word 'family' is often used as a collective noun, however, in this sentence is is not. The noun family is a collective noun for a family of otters, a family of sardines, a family of beavers, a family of friends, or a family of any other type.
You can find great family dinner recipes online. The Disney website has a great selection of family friendly dinner recipes that are sure to please the whole family. You can check out Disney's dinner recipes by following this link:http://familyfun.go.com/recipes/dinner-entrees/
yes!
No they did not have dinner tables, but a gathering for dinner where all were welcome as a family.
A possessive noun.