君たちは先生から何を習っていますか。

(used colloquially by young females) you (plural); all of you; you all

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

teacher; master; doctor; with names of teachers, etc. as an honorific; previous existence

from (e.g. time, place, numerical quantity); since; from (originator); by; because; since; out of (constituent, part); through (e.g. window, vestibule); after; since

what; how many; you-know-what; that; whatsit; what's the expression; what do you call them; what?; hey!

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to take lessons in; to be taught; to learn (from a teacher); to study (under a teacher); to get training in

indicates a question (sometimes rhetorical); or; whether or not; some- (e.g. something, someone); indicates doubt, uncertainty, etc.; emphatic prefix; suffix forming adjectives or adverbs; in that way