にひきかえ => In contrast to A N1
Comparison/ Exchange
めったにない => Rarely N3
Degree. Level, Amount
と([思「おも」]う、[言「い」]う、[考「かんが」]える) => That A N4
Particles
[必要「ひつよう」]はない => It is not necessary for A to be done N2
Needs, Requirements
てとうぜんだ => A is common, natural, not surprising N2
Adjectival, Descriptions
てしょうがない/てしかたがない => Very A; Really A; Extremely A N2
Degree, Level, Amount
ため(に) => For, because… N4
Cause and Effect
うと~まいと,うが~まいが => Whether or not A (is/occurs) N1
Based/focused/depending on
んがため => For the purpose of doing A N1
Reason, Result, Response
か~ないかのうちに => Right after A, C N2
Time, Situation
うが~うが => Whether A or B N1
Miscellaneous
というか~というか => (not sure if it's) A or B N1
Miscellaneous