New answers tagged copula
5
First, as a basic rule, the polite copula です must be preceded by a (pro)noun or an adjective (eg 犬です, 元気です). お名前はですか is plain ungrammatical because です is directly preceded by the topic marker は.
How about 何があなたのお名前ですか? This is actually grammatical, but almost always nonsensical, because this uses exhaustive-listing-ga and thus sounds like "What is the one ...
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