にひきかえ => In contrast to A N1
Comparison/ Exchange
[必要「ひつよう」]はない => It is not necessary for A to be done N2
Needs, Requirements
ようになる/なくなる => Become… N3
Time, Situation
なる => To become A(N) N5
Change, cause and effect
ようになる/なくなる => Come to A (transition over time), Come to be unable to A N4
Time and Change
ことになる => To decide that A N4
Causative, Passive, Volitional
ともなると,ともなれば => When (the time/situation) A N1
Time, Situation
ことになっている => Plan, rule, decide N2
Information, Report
を[余儀「よぎ」]なくされる => Must do A N1
Will, Decision, Doing
がちです/がちになる => A tends to become/happen/occur N2
Potential, Possibility
ざるを[得「え」]ない => Only A is left to do/can be done N2
(Not)only, (Not) even
うる/えない => A is possible, A can be done, A is not possible. N2
Potential, Possibility