にしても~にしても/にしろ~にしろ/にせよ~にせよ => whether… or ~, regardless of whether ~ N2
ませんでした => Did not... N5
Negation in the past
くせして => Even though A N2
Contrast,Surprise
(さ)せてほしい => Please let me do N3
Allow
にしても/にしろ/にせよ => even if; regardless; whether… or ~ N3
くせして => Although; Despite the fact that; Even though ~ N2
~ました/~ませんでした => Polite, past form of verb N5
Verb suffixes
じゃありませんでした => was not, were not N5
Emphasize negative meaning
をして…させる => to make somebody do something, to let somebody do something N2
Allow
にしろ/にせよ/にもせよ => Regardless of if it's A or B, Even in the case of A N2
Based, Focused, Depending on
させてください/させてもらえますか/させてもらえませんか => please let me do N3
せいか => perhaps because ~ N2