すら,ですら => Even A N1
(Not)only , (Not) even
[切「き」]れない => Can't finish/complete A N3
Potential, Possibility
からすると => Considering A... N2
Considering, Concerning
ですから => Because of A, B N3
Reason, Result, Response
させて[頂「いただ」]きます/させてもらいます => Allow me to A N1
Miscellaneous
の[末「すえ」]/た[末「すえ」] => conclusion N2
Reason, Result, Response
くする/にする => To make, to change into N5
Change, cause and effect
んです => Because, by… N4
Situations and Experiences
すると => A. Right after, B N2
Time, Situation
ことにする => Decide to N4
Causative, Passive, Volitional
ずにはすまない/ないではすまない => A must be done N1
Potential, Possibility
~ます/~ません => Polite, present form N5
Verb suffixes