"From" is a preposition. It doesn't seem like it because we expect prepositions to be followed by some phrase. The grammatically correct version of your sentence would be "From where are you coming?"
Prepositions show time (when something happened) or space (where something is located). "From where" is location.
you
The word "coming" is a present participle acting as a gerund in the sentence "he saw the multitude coming to him."
"When" is an adverb when it begins a sentence.
it depends what word it is it could be any part of speech depending on the sentence
In a sentence, the word "action" can function as a noun.
The part of speech for "gliding" is a gerund, which functions as a noun in a sentence.
The part of speech of "correct" in this sentence is an adjective.
'from' is a preposition
Need to have the complete sentence. "I am coming next week" he replied. -- direct speech He said that he was coming next week. -- indirect speech
The part of speech that answers "what" or "whom" in a sentence is a pronoun. Pronouns are words like "he," "she," "it," "they," "who," and "what" that replace nouns in a sentence.
All subjects are part of speech for they are all nouns.
Pronoun