You use ですか to ask a polite question. It comes after a noun or an adjective.
Noun + ですかPrimary
な-Adjective + ですか
い-Adjective + ですか
You use ですか to ask a polite question. It comes after a noun or an adjective.
この辺りは静かではありませんでしたか。
Wasn't this area quiet?
次の会議の場所はどこですか。
Where is the location of the next meeting?
すみません、お手洗いはどちらですか。
Excuse me, where is the restroom?
This is different from "か". You do not usually use "だか" for a question. Instead, you can just raise your voice. Or you can add "の" to ask "なの?". "ですか" is also more direct than "でしょうか".
Watch out: Do not say "食べますですか?". This is wrong. Just add "か" to the verb. Say "食べますか?". You use "ですか" only after nouns and adjectives.
Use this when you want to show you are listening. You can also use it to show surprise. Or you can use it to show you doubt something.
More formal alternatives(1)
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