I wish the comparative forms of adjectives could be or had been introduced in a separate lesson. In the last exercise we had the word for 'bigger' ('The bear is bigger than the wolf') while here we have the positive form, 'big', and for the life of me I cannot tell the two apart by their endings; the only clue, if it is a clue, is that in the former instance 'wolf' was in what I think is the genitive case. Am I missing some critical detail in the adjectival terminations – or does one turn a positive into a comparative by simply placing a genitive after it?
In Serbian, “откривати” means discover. Could I translate this sentence as “The boy is discovering the big box.”?
In Russian, "открывать" сan mean both "to open" and "to discover". You decide which translation is likelier in the case of a box.
So is открываеть related to открытка (postcard)?
A postcard is open and it sounds similar.