ないと/なくちゃ/なきゃ => must do; need to; gotta do ~ N3
ないと,なくちゃ => Must do A N3
Needs, Requirement
ちゃんと => Clear, neat, dignified, complete N3
Result status
ちゃんとする => Serious, tidy, complete N3
Result status
なくちゃ => must do; need to; gotta do ~ N3
Necessity, obligation
ちゃった => to do something by accident, to finish completely N3
~なくちゃいけない      => must do; need to; gotta do ~, say necessary to do something N5
Obligatory
じゃないが => It's not that... but... N4
How to say the beginning
んじゃない => can not, impossible to... N4
Ban
いちがいに…ない => Impossible... in general N2
Description
じゃないか => right? isn't it? let's~; confirmation N4
Speculation
ゃしない => Don't/Doesn't A (at all) N1
Will, Decision, Doing