[命令「めいれい」] => Do A (command) N4
Can, Should, Must
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”
ていられない => Cannot continue to A N2
Needs, Requirements
[切「き」]れない => Can't finish/complete A N3
Potential, Possibility
かれ~かれ => A or B N1
Lists, examples
てばかりはいられない => Cannot always A N2
Needs, Requirements
と[言「い」]わせれば => On the view of N1
Based/focused/depending on
~かもしれない => Might A, maybe A, perhaps A N4
Sentence Endings
かも[知「し」]れない => Might A, maybe A, perhaps A N3
Sentence Endings
なければならない => Must do A; have to A N4
Can, Should, Must
とあれば => If A N1
Conditional, While
それと => A, and B N3
List, Examples