くらいなら/ぐらいなら => rather than (do …)​ N1
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
くらい/ぐらい => approximately, about, almost N5
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”
~くらいで      => only N1
くらいの => Approximate~ N3
Emphasis on degree
ていられない => can't afford to; unable to ~ N2
ていられない => Cannot continue to A N2
Needs, Requirements
くらい~はない => Not to the extent of… N3
くらいだ/ぐらいだ => Around/about N5
Amount
まだV-られない => Not yet ~ N4
Ability
..... ばかりもいられない => can't keep doing ~ N2
Speculation