There a customer can order dishes that he would not be able to enjoy had the restaurant not established a menu on the basis of recipes, ingredients, and practice in preparation.

Could anyone tell me what does the sentence in the box mean? Is it grammatically correct?

Source:Extracted from an unknown book


This is conditional inversion, a construction in which a condition clause is expressed by subject-auxiliary inversion instead of with if:

... if the restaurant had not established ...
... had the restaurant not established ...

Today this is permitted only with the auxiliaries had, were and should, and it has rather an old-fashioned ring.

You can find many more questions about this construction by searching on the tags and .


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