たち => Plural form N5
Amount
[一方「いっぽう」]だ => Change A continues, A does not stop N2
Miscellaneous
がちです/がちになる => A tends to become/happen/occur N2
Potential, Possibility
[一方「いっぽう」] => On one hand A, on the other, B; Although A, at the same time, B N2
Contrast,Surprise
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
ないと,なくちゃ => Must do A N3
Needs, Requirement
に[違「ちが」]いない => Without a doubt, A N2
Information, Report
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
と、と、どちらが~ => Which is more C, A or B N4
Comparisons
[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
ちなみに => A. and/in addition/by the way, B (a little more information) N2
Information, Report