Used in negative statement to describe a situation that has existed up to this point or up to the present time.

synoniemen: as yet, heretofore, hitherto, so far, thus far, til now, up to now, yet.

Roget 118: at this time, at this moment etc. 113; at the present time etc. n.; now, at present; at hand.    at this time of day, today, nowadays; already; even now, but now, just now; on the present occasion; for the time being, for the nonce; pro hac vice.    [Lat.]; on the nail, on the spot; on the spur of the moment, until now; to this day, to the present day.    ... meer laten zien