なくてはいけない => Must do A; have to A N4
Can, Should, Must
くらいなら => I would prefer (doing) B over A N1
Contrast/Surprise
なければならない => Must do A; have to A N4
Can, Should, Must
くらいだ/ぐらいだ => Around/about N5
Amount
とはくらべ[物「もの」]にならない => It's no match for A N1
Comparison/ Exchange
ずにはいられない/ないではいられない => Can't help but A; A is unavoidable N2
Will, Decision, “Doing”
なくてもいい => Don't have to A N4
Can, Should, Must
~ないでください => Please don't do~ N5
Asking and Telling
てはいけない => May not A, must not A N4
Can, Should, Must
[決「けっ」]して~ない => Won’t, isn’t N3
Will, Decision, Doing
ないと,なくちゃ => Must do A N3
Needs, Requirement
わけにはいかない => Must not A, Must A N3
Needs, Requirement