や、やいなや => As soon as A, B N1
Time, Situation
やる => Give B to A N4
Give and take advice
てやる => Do for someone N4
Give and take advice
ない[方「ほう」]がよい => It would be better to not A N4
Can, Should, Must
てやまない => To (always) think/feel/hope/etc. A N1
Will, Decision, Doing
た[方「ほう」]がいい => It would be better to A N4
Can, Should, Must
やすい => A is easy to do N4
Verb Suffixes
やら~やら => A, B, ... (examples from a list) N2
Lists, Examples
[一方「いっぽう」]だ => Change A continues, A does not stop N2
Miscellaneous
ようになる/なくなる => Become… N3
Time, Situation
が[早「はや」]いか => As soon as A occurred, right after A N1
Time, Situation
ことになっている => Plan, rule, decide N2
Information, Report