Do you know that there is 'polite form' in Korean? I don't really know about Korean grammar. I'm Korean,though. ^^;; I'll tell you what comes up with my mind. I use 'ㅂ니다', when I want to make sentence polite, which means if you put 'ㅂ니다' with NOUN, it becomes polite way of speaking. Ex. 이것은 컴퓨터입니다. --> This is a computer. 이것은 컴퓨터다. --> This is a computer. Yes, Either of them is "This is a computer" in English since there is no polite way of speaking in English. (well, technically there ARE few polite ways of speaking English as far as I know^^) *The reason I wrote 'ㅂ' is that it depends on whether you use this polite from with VERB or NOUN. I guess most of noun go with '입니다'. However, Verb and Adjective depend on their form. ^^ so..Thank you for reading my comment and I hope this help you understand! If you have any questions, please feel free to message me! ^^ - Kim -

The ending -ㅂ니다 is a polite and formal form of the copula verb,-(이)다(=to be), and usually used in official documents, news or when meeting someone for the first time. Technically we call it "하십시오 style".^^' For example, 1) Noun(ending with the final consonant) + 이다 I am Korean = 난 한국인+이다 = 전 한국인 + 입니다. ('인' in "한국인" has the final consonant, 'ㄴ') 2) Noun(ending without the final consonant) + 다 This is coffee = 이것은 커피 + 다 = 이것은 커피 + 입니다 ('피' in "커피" doesn't have the final consonant, it just ends with a vowel, 'l') Here are some other speech styles. I am Korean = 난 한국인 + 이다 = 전 한국인 + 입니다(formal, polite) = 전 한국인 + 이에요(informal, polite, commonly used in spoken) = 전 한국인 + 이야(informal, not polite, between close friends) This is coffee. = 이것은 커피 + 다 = 이것은 커피 + 입니다 = 이것은 커피 + 예요, not 이에요 (because 피 doesn't have the final consonant) = 이것은 커피 + 야, not 이야(because 피 doesn't have the final consonant) \^o^/

The Korean language is spoken in 2 ways, they are: Formal language, and, Informal language. They use formal language while talking to their elders, people in higher post than them, people they’ve only met recently. They speak in informal language with their friends and family, their peers and the other people they have friendly relations with. The suffixes “입니다”, “습니다”, and “합니다” are used when the Korean people talk in the Formal language. In a formal setting like a job interview, and when you talk with someone formally we have to use 입니다, 입니까? In a statement, you can use ‘입니다‘ In a question sentence, you can use ‘입니까?’ In a negative sentence, you can use ‘이/가아닙니다.’ 입니다 means to be.입니까 is an interrogative form & used to make questions.입니다 입니까 are used after a noun and are used in formal conditions like in Newspaper/ TV News. For more detail read this article. https://koreanly.com/%EC%9E%85%EB%8B%88%EB%8B%A4-%EC%9E%85%EB%8B%88%EA%B9%8C-grammar/#Summary