For example and to make the precedent answer complete: tofu desu ka: is this tofu ? tofu ga arimasu ka: is there tofu? ( or "have you got tofu ?") "arimasu ka" is used for non living things 'imasu ka" is used for human beings or animals Hachiko-chan ha imasu ka: Is Hakiko here ? To go a bit further, be careful not to systematically translate "desu" by "is" (or "are"). For example: "Watashi ha koohii desu" doesn't mean "I'm a coffee"...It would have no sense !! It means, "I will have a coffee" when you answer the barman

arimasuka: In English it's like 'Do you have ~~?' or 'Is there~~?' We use this phrase for things. For example, at a shop you ask a sales cleark, ' Sushi wa arimasuka?' imasuka: 'Is ~~ there?' We use this for a person. For example, on the phone, you ask 'Jane wa imasuka?' desuka: When you ask something, we put 'desuka?' at the end of a sentence. 'Tofu desuka?'

arimasuka （无生命的东西）在吗 desuka 是吗 imasuka（有生命的东西）在吗

Arismasu　Is used to describe the existance of inanimate objects. Arimasuka　Is asking whether something is there、 Kore Ha Arimasuka？Means "is there this?"　Or it can mean"do you have this?" Imasu　Describes the existance of animate objects, such as humans and animals. usagi ha imasuka？Means "are there rabbits" or "do you have (a) rabbit(s)？ desu　Means that something Is something else、desu　Is a contraction of de gozaimasu, where de is fixed after the word meant to describe the subject. "watashi ha ningen desu" means "I am Human" so "anata ha ningen desuka?" will be "are you human?" (although this is an odd question to ask)