[切「き」]れない => Can't finish/complete A N3
Potential, Possibility
てさしあげる => Do for N4
Give and take advice
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
し(~し) => and ... N4
Cause and Effect
ではあるまいし => It's not like A, it isn't as if A N1
Reason, Result, Response
さしあげる => Give B to A (A is a third party, not yourself) N4
Give and take advice
らしい => Seem to~ N4
Sentence Endings
~ました/~ませんでした => Polite, past form of verb N5
Verb suffixes
もし~としても => Even if A... (chances of A are pretty low) N3
Not only, Not even
[際「さい」]して/に([際「さい」]し)/に[際「さい」]しての => At the time of A (which starts now).. N2
Time, Situation
~がほしい => I want ~ N5
Asking and Telling
ただし => A。However, B N2
Contrast,Surprise