~ている。 => Doing something temporarily. N5
Secondary Verbs
ていられない => Cannot continue to A N2
Needs, Requirements
なくてもいい => Don't have to A N4
Can, Should, Must
をおいて~ない => Other than A, B N1
(Not)only , (Not) even
がっている => Want, like N4
Secondary Verb
~てください => Please do ~ N5
Asking and Telling
ときている => Because of A N1
Reason, Result, Response
がっている => Wants to A N3
Will, Decision, Doing
て[頂「いただ」]く => Do for N4
Give and take advice
てしょうがない/てしかたがない => Very A; Really A; Extremely A N2
Degree, Level, Amount
てはいけない => May not A, must not A N4
Can, Should, Must
て[以来「いらい」] => After A, B (continuous action/condition N2
Information, Report