ずにはおかない/ないではおかない => Will definitely A, N1
Will, Decision, Doing
ずにはすまない/ないではすまない => A must be done N1
Potential, Possibility
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”
どころではない => Its not A N2
Contrast,Surprise
てばかりはいられない => Cannot always A N2
Needs, Requirements
はずがない => Cannot be A, should not be A N4
Sentence Endings
というものではない => Not sure, not means N2
Information, Report
きりがない => There's no end to A, there's no bounds to A N1
Adjectival, Descriptions
ないものでもない/ないでもない => A is not completely impossible N1
Need/Requirements
がちです/がちになる => A tends to become/happen/occur N2
Potential, Possibility
うではないか/うじゃないか => Let's go A; Why don't we A? N2
Miscellaneous
[可能系「かのうけい」] => Can, be able to, be possible to N4
Can, Should, Must