た[方「ほう」]がいい => It would be better to A N4
Can, Should, Must
ない[方「ほう」]がよい => It would be better to not A N4
Can, Should, Must
[一方「いっぽう」]だ => Change A continues, A does not stop N2
Miscellaneous
より~の[方「ほう」]が~ => B is more C than A N4
Comparisons
[一方「いっぽう」] => On one hand A, on the other, B; Although A, at the same time, B N2
Contrast,Surprise
といい~といい => Based on A and B, considering A and B N1
Reason, Result, Response
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”
といえば/というと/といったら => N3
Considering, Concerning
ないものでもない/ないでもない => A is not completely impossible N1
Need/Requirements
[命令「めいれい」] => Do A (command) N4
Can, Should, Must
かい => Really? N4
Sentence Endings
ていられない => Cannot continue to A N2
Needs, Requirements