English verb conjugation
SHOULD UNTIE

Regular verb: untie - untied - untied

Affirmation

Simple form	V-ing form
I'd untie you'd untie she'd untie we'd untie you'd untie they'd untie	I'd be untying you'd be untying she'd be untying we'd be untying you'd be untying they'd be untying
Perfect	V-ing perfect
I should've untied you should've untied she should've untied we should've untied you should've untied they should've untied	I should've been untying you should've been untying she should've been untying we should've been untying you should've been untying they should've been untying

Negation

Simple form	V-ing form
I shouldn't untie you shouldn't untie she shouldn't untie we shouldn't untie you shouldn't untie they shouldn't untie	I shouldn't be untying you shouldn't be untying she shouldn't be untying we shouldn't be untying you shouldn't be untying they shouldn't be untying
Perfect	V-ing perfect
I shouldn't have untied you shouldn't have untied she shouldn't have untied we shouldn't have untied you shouldn't have untied they shouldn't have untied	I shouldn't have been untying you shouldn't have been untying she shouldn't have been untying we shouldn't have been untying you shouldn't have been untying they shouldn't have been untying

Interrogative form

Simple form	V-ing form
should I untie? should you untie? should she untie? should we untie? should you untie? should they untie?	should I be untying? should you be untying? should she be untying? should we be untying? should you be untying? should they be untying?
Perfect	V-ing perfect
should I have untied? should you have untied? should she have untied? should we have untied? should you have untied? should they have untied?	should I have been untying? should you have been untying? should she have been untying? should we have been untying? should you have been untying? should they have been untying?

Interro-negative form

Simple form	V-ing form
shouldn't I untie? shouldn't you untie? shouldn't she untie? shouldn't we untie? shouldn't you untie? shouldn't they untie?	shouldn't I be untying? shouldn't you be untying? shouldn't she be untying? shouldn't we be untying? shouldn't you be untying? shouldn't they be untying?
Perfect	V-ing perfect
shouldn't I have untied? shouldn't you have untied? shouldn't she have untied? shouldn't we have untied? shouldn't you have untied? shouldn't they have untied?	shouldn't I have been untying? shouldn't you have been untying? shouldn't she have been untying? shouldn't we have been untying? shouldn't you have been untying? shouldn't they have been untying?