や、やいなや => As soon as A, B N1
Time, Situation
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
~ました/~ませんでした => Polite, past form of verb N5
Verb suffixes
てもかまわない => No problem N4
Can, Should, Must
やすい => A is easy to do N4
Verb Suffixes
てしまう => Did something N4
Secondary Verb
やら~やら => A, B, ... (examples from a list) N2
Lists, Examples
まだしも => A is acceptable, N2
Comparison, Exchange
まい/まいか => Not A, Probably not A, I will definitely not A, Whether or not to A N2
Will, Decision, “Doing”
うか~まいか => Whether to do A or B (do or not do) N1
Will, Decision, Doing
しか~ない => Only , no more than , There's only N5
Amount