[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
んです => Because, by… N4
Situations and Experiences
がちです/がちになる => A tends to become/happen/occur N2
Potential, Possibility
~ます/~ません => Polite, present form N5
Verb suffixes
うち/ないうち => While A is the case, B; While A is occuring, B, While A is not occuring, B N3
Conditional, While
ことにする => Decide to N4
Causative, Passive, Volitional
[謙譲語「けんじょうご」] => Humble form of A, humble form of する verbs N4
Honorifics
はもちろん/はもとより => Although A is given/obvious; B N3
List, Examples
に[反「はん」]して/に[反「はん」]し/に[反「はん」]する/に[反「はん」]した => In contrast to A N2
Contrast,Surprise
か~ないかのうちに => Right after A, C N2
Time, Situation
[最中「さいちゅう」] => In the middle of A N3
Time, Situation
こそすれ => B is definitely not so (strongly emphasized) N1
Contrast/Surprise