[恐「おそ」]れがある => There is a chance of A N2
Potential, Possibility
たことがある => Have done A before N4
Situations and Experiences
てくれてありがとう => Thank you for doing A N4
Honorifics
ことがある => There are times when A (occurs/exists) N4
Situations and Experiences
とあれば => If A N1
Conditional, While
きらいがある => There is a tendency to do A N1
Potential, Possibility
ものがある => Shows a situation/condition A that draws strong feelings/emotions N2
Information, Report
であれ,であろうと => Even A, Both A and B N1
(Not)only , (Not) even
こそあれ => Although A (A is some negative attribute) N1
Contrast/Surprise
あるいは => A or B N2
Lists, Examples
てあげる => Help, do for N4
Give and take advice
てくれる => Do for someone. N4
Give and take advice