いつこれを返していただけますか。

when; how soon

this (indicating an item near the speaker, the action of the speaker, or the current topic); this person (usu. indicating someone in one's in-group); now; here; I (me); certainly

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 return (something); to restore; to put back; to turn over; to turn upside down; to overturn; to pay back; to retaliate; to reciprocate; to repeat ...; to do ... back

to be able to receive; to be able to take; to be able to accept; to be able to eat; to be able to drink; to be acceptable; to be satisfactory

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