English verb conjugation
SHOULD THREATEN

Regular verb: threaten - threatened - threatened

Affirmation

Simple form	V-ing form
I'd threaten you'd threaten she'd threaten we'd threaten you'd threaten they'd threaten	I'd be threatening you'd be threatening she'd be threatening we'd be threatening you'd be threatening they'd be threatening
Perfect	V-ing perfect
I should've threatened you should've threatened she should've threatened we should've threatened you should've threatened they should've threatened	I should've been threatening you should've been threatening she should've been threatening we should've been threatening you should've been threatening they should've been threatening

Negation

Simple form	V-ing form
I shouldn't threaten you shouldn't threaten she shouldn't threaten we shouldn't threaten you shouldn't threaten they shouldn't threaten	I shouldn't be threatening you shouldn't be threatening she shouldn't be threatening we shouldn't be threatening you shouldn't be threatening they shouldn't be threatening
Perfect	V-ing perfect
I shouldn't have threatened you shouldn't have threatened she shouldn't have threatened we shouldn't have threatened you shouldn't have threatened they shouldn't have threatened	I shouldn't have been threatening you shouldn't have been threatening she shouldn't have been threatening we shouldn't have been threatening you shouldn't have been threatening they shouldn't have been threatening

Interrogative form

Simple form	V-ing form
should I threaten? should you threaten? should she threaten? should we threaten? should you threaten? should they threaten?	should I be threatening? should you be threatening? should she be threatening? should we be threatening? should you be threatening? should they be threatening?
Perfect	V-ing perfect
should I have threatened? should you have threatened? should she have threatened? should we have threatened? should you have threatened? should they have threatened?	should I have been threatening? should you have been threatening? should she have been threatening? should we have been threatening? should you have been threatening? should they have been threatening?

Interro-negative form

Simple form	V-ing form
shouldn't I threaten? shouldn't you threaten? shouldn't she threaten? shouldn't we threaten? shouldn't you threaten? shouldn't they threaten?	shouldn't I be threatening? shouldn't you be threatening? shouldn't she be threatening? shouldn't we be threatening? shouldn't you be threatening? shouldn't they be threatening?
Perfect	V-ing perfect
shouldn't I have threatened? shouldn't you have threatened? shouldn't she have threatened? shouldn't we have threatened? shouldn't you have threatened? shouldn't they have threatened?	shouldn't I have been threatening? shouldn't you have been threatening? shouldn't she have been threatening? shouldn't we have been threatening? shouldn't you have been threatening? shouldn't they have been threatening?