てしょうがない/てしかたがない => Very A; Really A; Extremely A N2
Degree, Level, Amount
[受「う」]け[身「み」] => Passive, be V-ed. N4
Causative, Passive, Volitional
がた => Plural form(polite) N5
Amount
た[方「ほう」]がいい => It would be better to A N4
Can, Should, Must
がたい => Hard to do A (almost impossible to A) N2
Adjectival, Descriptions
[使「し」][役「えき」][受「う」]け[身「み」] => Imperative N4
Causative, Passive, Volitional
たが[最後「さいご」] => Once A occurs, B happens N1
Information, Report
に[違「ちが」]いない => Without a doubt, A N2
Information, Report
めったにない => Rarely N3
Degree. Level, Amount
といったらない/といったらありはしない => Extremely A, Very A, A beyond description N1
Degree/ Level/Amount
かたがた => Using A as an opportunity/chance/way to B N1
Information, Report
したがって => Because of A, B N2
Reason, Result, Response