can protrude
Regular verb: protrude - protruded- protruded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can protrude
you can protrude
she can protrude
we can protrude
you can protrude
they can protrude 	I can be protruding
you can be protruding
she can be protruding
we can be protruding
you can be protruding
they can be protruding	I can have protruded
you can have protruded
she can have protruded
we can have protruded
you can have protruded
they can have protruded	I can have been protruding
you can have been protruding
she can have been protruding
we can have been protruding
you can have been protruding
they can have been protruding	

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

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

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