6.90 indefinite place adverbs
There are four indefinite adverbs of position: 'anywhere', 'everywhere', 'nowhere', and 'somewhere'. They are used to indicate a position which is not definite or is very general.
'Nowhere' makes a clause negative.
If 'nowhere' is at the beginning of a clause, the subject of the verb must be placed after an auxiliary or a form of 'be' or 'have'.