に決まっている => certainly; I’m sure/certain that; it must be the case that ~ N2
決して~ない => never; by no means ~ N3
に[決「き」]まっている => A is a given, A must be the case N2
Information, Report
あまり => so much… N3
More or less in quantity
~きわまる/きわまりない(~極まる/極まりない)      => extremely; very ~ N1
[決「けっ」]して~ない => Won’t, isn’t N3
Will, Decision, Doing
がわかります => Capacity N5
Ability
[事「こと」]だ => A is necessary/good (offering advice/suggestion) N3
Needs, Requirement
あまりに(も)~と / あんまりに(も)~と => too much; so much… that; excessively ~ N3
Extreme level
つまり => in other words; in summary N3
事と次第によって => Depending on the progress of the situation N2
How to say the beginning
あまりに (も) => too much; so much… N3
Extreme level