の下で/の下に => under; with ~ N2
一体 => …the heck; …in the world; …on earth N3
以下 => As follows, below N3
Standard
[後「あと」]で => After V1, V2 N5
Time
〜がさいご(が最後) => if you do... negative result N1
Decisive (resolute decision)
のが下手 => to be bad at doing something N5
たが[最後「さいご」] => Once A occurs, B happens N1
Information, Report
て[下「くだ」]さる => Do for someone N4
Give and take advice
[以下「いか」] => Less than A, under/below A (amount) N1
Degree/ Level/Amount
て下さいませんか => Please do A (polite) N5
Asking and Telling
[下「くだ」]さる => Give B to A (A is you, your friends, your family, etc.) N4
Give and take advice