ほとんど…た => hardly any, almost all N2
Description
どんなに…だろう(か) => how…!; what…! N3
Emphasis on degree
ませんでした => Did not... N5
Negation in the past
どうして => why; for what reason; how N5
どうも ... そうだ/ ようだ/ らしい => It seems, probably N3
Speculation
~ました/~ませんでした => Polite, past form of verb N5
Verb suffixes
...どおし => Throughout N3
Continuous
どんな => Whatever, anything (also) N5
Things do not match the prediction
たしかに/なるほど~かもしれない => might; perhaps N3
Speculation
なんか/なんて/など => give examples N3
に[反「はん」]して/に[反「はん」]し/に[反「はん」]する/に[反「はん」]した => In contrast to A N2
Contrast,Surprise
~もどうぜんだ(~も同然だ)      => just like; same as ~ N1