English verb conjugation
SHOULD BUCKLE

Regular verb: buckle - buckled - buckled

Affirmation

Simple form	V-ing form
I'd buckle you'd buckle she'd buckle we'd buckle you'd buckle they'd buckle	I'd be buckling you'd be buckling she'd be buckling we'd be buckling you'd be buckling they'd be buckling
Perfect	V-ing perfect
I should've buckled you should've buckled she should've buckled we should've buckled you should've buckled they should've buckled	I should've been buckling you should've been buckling she should've been buckling we should've been buckling you should've been buckling they should've been buckling

Negation

Simple form	V-ing form
I shouldn't buckle you shouldn't buckle she shouldn't buckle we shouldn't buckle you shouldn't buckle they shouldn't buckle	I shouldn't be buckling you shouldn't be buckling she shouldn't be buckling we shouldn't be buckling you shouldn't be buckling they shouldn't be buckling
Perfect	V-ing perfect
I shouldn't have buckled you shouldn't have buckled she shouldn't have buckled we shouldn't have buckled you shouldn't have buckled they shouldn't have buckled	I shouldn't have been buckling you shouldn't have been buckling she shouldn't have been buckling we shouldn't have been buckling you shouldn't have been buckling they shouldn't have been buckling

Interrogative form

Simple form	V-ing form
should I buckle? should you buckle? should she buckle? should we buckle? should you buckle? should they buckle?	should I be buckling? should you be buckling? should she be buckling? should we be buckling? should you be buckling? should they be buckling?
Perfect	V-ing perfect
should I have buckled? should you have buckled? should she have buckled? should we have buckled? should you have buckled? should they have buckled?	should I have been buckling? should you have been buckling? should she have been buckling? should we have been buckling? should you have been buckling? should they have been buckling?

Interro-negative form

Simple form	V-ing form
shouldn't I buckle? shouldn't you buckle? shouldn't she buckle? shouldn't we buckle? shouldn't you buckle? shouldn't they buckle?	shouldn't I be buckling? shouldn't you be buckling? shouldn't she be buckling? shouldn't we be buckling? shouldn't you be buckling? shouldn't they be buckling?
Perfect	V-ing perfect
shouldn't I have buckled? shouldn't you have buckled? shouldn't she have buckled? shouldn't we have buckled? shouldn't you have buckled? shouldn't they have buckled?	shouldn't I have been buckling? shouldn't you have been buckling? shouldn't she have been buckling? shouldn't we have been buckling? shouldn't you have been buckling? shouldn't they have been buckling?