DESCRIBE THIS GRAMMAR : Do networks show nature documentaries on prime-time television.?

Answer 1

It is, very obviously, a question containing two examples of adjectival nouns. In "nature documentaries" the noun "nature" is used as an adjective to describe the type of documentary. In "prime-time television" the composite noun "prime time" is used to describe television. The word "prime" can be either an adjective or a noun in English. Here is a link showing the various possible meanings. http://www.answers.com/topic/prime. Here the meaning is "optimal" -- the time when television is viewed by the largest number of viewers.

Answer 2

Yes/no questions require Do/Does at the beginning.