Breakdown of Если бы картограф знал координаты горы Эльбрус, то он бы не ошибался.
не
not
он
he / it (for a masculine noun) / it (for a neuter noun)
знать
to know
ошибаться
to be mistaken
гора
mountain
бы
would (conditional particle) / concessive particle
если
if
то
then (in that case)
картограф
cartographer (m)
координата
coordinate (f)
Эльбрус
Elbrus (m)
Questions & Answers about Если бы картограф знал координаты горы Эльбрус, то он бы не ошибался.
Why doesn't Эльбрус change its case to match горы?
This is a special rule for geographic appositives. While names of cities and rivers usually decline to match their generic noun (like в городе Москве), names of mountains, lakes, and islands typically stay in the nominative case. Since гора is the generic word here, it takes the genitive case (горы) after координаты, but Эльбрус remains in the nominative.
Why do we use the past tense verbs знал and ошибался for a present-tense hypothetical?
Why is the imperfective verb ошибался used instead of the perfective ошибся?
The imperfective ошибался is used because the English translation implies a general, recurring habit of not making mistakes. If the sentence were talking about avoiding one specific mistake on a single occasion, it would use the perfective ошибся.
What is the function of то in the middle of the sentence? Can I drop it?
То translates to 'then' and introduces the result clause in a conditional sentence. While you can sometimes omit it in casual speech, it is standard and strongly preferred when the first clause begins with Если бы. It gives the sentence a clear, logical structure.
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