ないと/なくちゃ/なきゃ => must do; need to; gotta do ~ N3
なくちゃ => must do; need to; gotta do ~ N3
Necessity, obligation
んじゃなかったか => shouldn't have... N4
Regret
ないと,なくちゃ => Must do A N3
Needs, Requirement
ちゃった => to do something by accident, to finish completely N3
んじゃないだろうか => could it be that ~; might it be that ~ N4
Speculation
いらっしゃる => to be; to come; to go (polite version) N4
いまごろになって => Only now ... N3
Time
ところだった => About to… N3
Will, Decision, Doing
じゃないだろうか => I think ... isn't it?, It might be that..., Don't you agree? N4
Speculation
ろくでもない => good-for-nothing, useless, worthless N1
Evaluate
んじゃ => If ... then... N4
Condition (hypothetical condition)