ないことはない/ないこともない => can do; is not impossible to ~ N3
いっこうに ... ない => Still haven't seen... N3
Emphasize negative meaning
ないことには~ない => unless you ~ N2
をいいことに => to take advantage of ~ N1
Criticize
~みこみちがい / みこみはずれ> => ~Contrary to expectations N1
Beyond expectations
ということ => It means that N3
Description
~こういうふう => like this N1
Means and methods
そこへいくと => In comparison N3
Proportional, parallel
~こと請け合い => I guarantee ... N1
Happens next
ないことはない => is not impossible to ~. N2
ここ/そこ/あそこ/こちら/そちら/あちら => here / there / over there N5
Spatial relations
ことこのうえない => the most of all; the best; nothing is ... N2
Emphasis on degree