[切「き」]れない => Can't finish/complete A N3
Potential, Possibility
[事「こと」]ができる => Be able to A; can do A, Can A; be possible to A; N4
Causative, Passive, Volitional
てくれる => Do for someone. N4
Give and take advice
こそすれ => B is definitely not so (strongly emphasized) N1
Contrast/Surprise
こそあれ => Although A (A is some negative attribute) N1
Contrast/Surprise
ときている => Because of A N1
Reason, Result, Response
ことにする => Decide to N4
Causative, Passive, Volitional
きる => To do A completely/exhaustively/to the end N2
Potential, Possibility
ことになる => To decide that A N4
Causative, Passive, Volitional
とされる => It is said/believed/thought that A N1
Information, Report
[極「きわ」]まる => Extremely A, could not be more A N1
Adjectival, Descriptions
たことがある => Have done A before N4
Situations and Experiences