なければならない/なくてはならない/なければいけない/なくてはいけない/なければだめ/なくてはだめ => must N5
…けれど => Explanation N3
Exclamatory
けれど => but; however; although N4
How to say the beginning
けれど => but; however; although N4
Things do not match the prediction
... はいけません => must not; may not; cannot N4
Ban
いただけませんか => could you please ~ N4
けれども => but; however; although ~ N4
How to say the beginning
なければ ~ない => must do something; have to do something N4
Conditions (necessary conditions)
[尊敬語「そんけいご」] => Respectful form of A N4
Honorifics
なければ~た => If only it weren't... then... N4
Speculation
~ぶん (だけ) => in proportion to; just as much as N1
Related, corresponding
これだけ … のだから ... => To this extent... N2
Emphasis on degree