Breakdown of Я меняю деньги в банке.
в
in / to (direction)
банк
bank
деньги
money
менять
to change, to exchange
Questions & Answers about Я меняю деньги в банке.
Why didn't the word деньги change its ending here, since it is the direct object?
Деньги (money) is the direct object receiving the action, so it requires the accusative case. However, because it is an inanimate noun and a plural-only word in Russian, its accusative form looks exactly the same as its nominative (dictionary) form.
Does the verb менять only mean to exchange currency?
No, менять is a very common verb for changing or swapping things in general. You can use it to talk about changing clothes, changing jobs, or exchanging items, not just money.
Why do we use в банке for 'at the bank' instead of a different preposition?
Russian doesn't have a single direct equivalent to the English 'at'. For physical buildings, enclosed spaces, and institutions like a bank, you use the preposition в (in) plus the prepositional case. So в банке literally translates to 'in the bank'.
How do I form other present tense endings for the verb менять?
Менять is a regular first-conjugation verb. You just drop the -ть and add standard endings: ты меняешь (you change), он меняет (he changes), мы меняем (we change), вы меняете (you plural/formal change), and они меняют (they change).