に先立って => before; prior to ~ N2
に[先立「さきだ」]って/に[先立「さきだ」]ち/に[先立「さきだ」]つ => Before A occurs/takes place N2
Time, Situation
たいがい => in general N2
Repetition, habit
...たいんですが => want N4
How to say the beginning
てしょうがない/てしかたがない => Very A; Really A; Extremely A N2
Degree, Level, Amount
がたい => very difficult to; hard to ~ N2
~んがため(に)/~んがための      => in order to ~ N1
がないでもない => is not entirely impossible N2
Explain
いちがいに…ない => Impossible... in general N2
Description
て仕方がない/てしょうがない => can't help but; very; extremely ~ N2
よりしかたがない => There is no choice but, Can't be helped, Inevitable N2
Limit
ていただけるとありがたい => I would really appreciate it if ... N3
Exclamatory