ないと/なくちゃ/なきゃ => must do; need to; gotta do ~ N3
ときとして => sometimes... N2
Trend
いらっしゃる => to be; to come; to go (polite version) N4
ときとして…ない => At no time N2
Emphasize the negative meaning
きっと => surely; undoubtedly; almost certainly; most likely N4
もし~としても/もし~としたって => Assuming; Even if ~ N3
としたところで/としたって/にしたところで/にしたって => Even if; Even supposing that ~ N1
んじゃなかったか => shouldn't have... N4
Regret
てっきり...と思う => surely; certainly; without a doubt N3
ちゃんと => Clear, neat, dignified, complete N3
Result status
ゃしない => Don't/Doesn't A (at all) N1
Will, Decision, Doing
ちゃった => to do something by accident, to finish completely N3