や、やいなや => As soon as A, B N1
Time, Situation
かれ~かれ => A or B N1
Lists, examples
~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
てばかりはいられない => Cannot always A N2
Needs, Requirements
やら~やら => A, B, ... (examples from a list) N2
Lists, Examples
てやまない => To (always) think/feel/hope/etc. A N1
Will, Decision, Doing
が[早「はや」]いか => As soon as A occurred, right after A N1
Time, Situation
てやる => Do for someone N4
Give and take advice
やる => Give B to A N4
Give and take advice
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”
なければならない => Must do A; have to A N4
Can, Should, Must