Antonyms for the phrase "at present time" can be categorized into various groups. Firstly, words like "anterior", "past", and "beforehand" can be used to describe the opposite of the present time. Secondly, "off", "discontinuous", and "intermittent" can be used to represent a lack of continuity or consistency in the present moment. Thirdly, "unstable", "unsteady", and "inconstant" can be used to describe a state of flux or change, in contrast to the stability of the present time. Lastly, "future", "later", and "subsequent" can represent the opposite of the present time in terms of chronological order.