When studying Italian grammar at school, we got used to classify the parts of a sentence; the purpose was being able to apply some grammar rules we were learning.
As such, I tendentially try to classify the various part of a sentence also with English.
Does asking which part of speech an English sentence make sense (e.g. asking if a phrase is an adverb), or do those questions really hide the real question, in the same way questions asking for a tutorial about doing something do?