could protrude
Verbo regular: protrude - protruded- protruded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could protrude
you could protrude
he could protrude
we could protrude
you could protrude
they could protrude 	I could be protruding
you could be protruding
he could be protruding
we could be protruding
you could be protruding
they could be protruding	I could have protruded
you could have protruded
he could have protruded
we could have protruded
you could have protruded
they could have protruded	I could have been protruding
you could have been protruding
he could have been protruding
we could have been protruding
you could have been protruding
they could have been protruding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not protrude
you could not protrude
he could not protrude
we could not protrude
you could not protrude
they could not protrude 	I could not be protruding
you could not be protruding
he could not be protruding
we could not be protruding
you could not be protruding
they could not be protruding	I could not have protruded
you could not have protruded
he could not have protruded
we could not have protruded
you could not have protruded
they could not have protruded	I could not have been protruding
you could not have been protruding
he could not have been protruding
we could not have been protruding
you could not have been protruding
they could not have been protruding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I protrude?
could you protrude?
could he protrude?
could we protrude?
could you protrude?
could they protrude? 	could I be protruding?
could you be protruding?
could he be protruding?
could we be protruding?
could you be protruding?
could they be protruding? 	could I have protruded?
could you have protruded?
could he have protruded?
could we have protruded?
could you have protruded?
could they have protruded? 	could I have been protruding?
could you have been protruding?
could he have been protruding?
could we have been protruding?
could you have been protruding?
could they have been protruding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not protrude?
could you not protrude?
could he not protrude?
could we not protrude?
could you not protrude?
could they not protrude? 	could I not be protruding?
could you not be protruding?
could he not be protruding?
could we not be protruding?
could you not be protruding?
could they not be protruding? 	could I not have protruded?
could you not have protruded?
could he not have protruded?
could we not have protruded?
could you not have protruded?
could they not have protruded? 	could I not have been protruding?
could you not have been protruding?
could he not have been protruding?
could we not have been protruding?
could you not have been protruding?
could they not have been protruding?