should protrude
Regular verb: protrude - protruded- protruded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd protrude
you'd protrude
she'd protrude
we'd protrude
you'd protrude
they'd protrude 	I'd be protruding
you'd be protruding
she'd be protruding
we'd be protruding
you'd be protruding
they'd be protruding	I should've protruded
you should've protruded
she should've protruded
we should've protruded
you should've protruded
they should've protruded	I should've been protruding
you should've been protruding
she should've been protruding
we should've been protruding
you should've been protruding
they should've been protruding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't protrude
you shouldn't protrude
she shouldn't protrude
we shouldn't protrude
you shouldn't protrude
they shouldn't protrude 	I shouldn't be protruding
you shouldn't be protruding
she shouldn't be protruding
we shouldn't be protruding
you shouldn't be protruding
they shouldn't be protruding	I shouldn't have protruded
you shouldn't have protruded
she shouldn't have protruded
we shouldn't have protruded
you shouldn't have protruded
they shouldn't have protruded	I shouldn't have been protruding
you shouldn't have been protruding
she shouldn't have been protruding
we shouldn't have been protruding
you shouldn't have been protruding
they shouldn't have been protruding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I protrude?
should you protrude?
should she protrude?
should we protrude?
should you protrude?
should they protrude? 	should I be protruding?
should you be protruding?
should she be protruding?
should we be protruding?
should you be protruding?
should they be protruding? 	should I have protruded?
should you have protruded?
should she have protruded?
should we have protruded?
should you have protruded?
should they have protruded? 	should I have been protruding?
should you have been protruding?
should she have been protruding?
should we have been protruding?
should you have been protruding?
should they have been protruding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I protrude?
shouldn't you protrude?
shouldn't she protrude?
shouldn't we protrude?
shouldn't you protrude?
shouldn't they protrude? 	shouldn't I be protruding?
shouldn't you be protruding?
shouldn't she be protruding?
shouldn't we be protruding?
shouldn't you be protruding?
shouldn't they be protruding? 	shouldn't I have protruded?
shouldn't you have protruded?
shouldn't she have protruded?
shouldn't we have protruded?
shouldn't you have protruded?
shouldn't they have protruded? 	shouldn't I have been protruding?
shouldn't you have been protruding?
shouldn't she have been protruding?
shouldn't we have been protruding?
shouldn't you have been protruding?
shouldn't they have been protruding?