つつ/つつも => While A, B. Although A (is beng done), B N2
Information, Report
せいで/せいか => Because of A, B N3
Reason, Result, Response
つ~つ => Doing A and B (repeatedly, one after another) N1
Information, Report
つつある => In the middle of A; in the process of A N2
Time, Situation
[必要「ひつよう」]はない => It is not necessary for A to be done N2
Needs, Requirements
くせして => Even though A N2
Contrast,Surprise
~ます/~ません => Polite, present form N5
Verb suffixes
しまつだ => Denotes negative results A N1
Reason, Result, Response
~ませんか => Let's…, Would you like to... N5
Verb suffixes
てみせる => To show (the action) A N1
Will, Decision, Doing
くせに => Even though A, unfortunate result B N3
Contrast
させて[頂「いただ」]きます/させてもらいます => Allow me to A N1
Miscellaneous