ascertain [v.]
-ascertain
Iascertain
youascertain
heascertains
weascertain
youascertain
theyascertain
Iascertained
youascertained
heascertained
weascertained
youascertained
theyascertained
Iwillascertain
youwillascertain
hewillascertain
wewillascertain
youwillascertain
theywillascertain
Ihaveascertained
youhaveascertained
hehasascertained
wehaveascertained
youhaveascertained
theyhaveascertained
-ascertaining
-ascertained