がちです/がちになる => A tends to become/happen/occur N2
Potential, Possibility
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
か~ないかのうちに => Right after A, C N2
Time, Situation
ないと,なくちゃ => Must do A N3
Needs, Requirement
[最中「さいちゅう」] => In the middle of A N3
Time, Situation
ねばならない => Must A N2
Needs, Requirements
[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
に[違「ちが」]いない => Without a doubt, A N2
Information, Report
ずにはすまない/ないではすまない => A must be done N1
Potential, Possibility
たち => Plural form N5
Amount
そういえば => Speaking of .., A by the way, A; N2
Considering, Concerning
なければならない => Must do A; have to A N4
Can, Should, Must