could stridulate
Verbo regular: stridulate - stridulated- stridulated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could stridulate
you could stridulate
she could stridulate
we could stridulate
you could stridulate
they could stridulate 	I could be stridulating
you could be stridulating
she could be stridulating
we could be stridulating
you could be stridulating
they could be stridulating	I could have stridulated
you could have stridulated
she could have stridulated
we could have stridulated
you could have stridulated
they could have stridulated	I could have been stridulating
you could have been stridulating
she could have been stridulating
we could have been stridulating
you could have been stridulating
they could have been stridulating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not stridulate
you could not stridulate
she could not stridulate
we could not stridulate
you could not stridulate
they could not stridulate 	I could not be stridulating
you could not be stridulating
she could not be stridulating
we could not be stridulating
you could not be stridulating
they could not be stridulating	I could not have stridulated
you could not have stridulated
she could not have stridulated
we could not have stridulated
you could not have stridulated
they could not have stridulated	I could not have been stridulating
you could not have been stridulating
she could not have been stridulating
we could not have been stridulating
you could not have been stridulating
they could not have been stridulating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I stridulate?
could you stridulate?
could she stridulate?
could we stridulate?
could you stridulate?
could they stridulate? 	could I be stridulating?
could you be stridulating?
could she be stridulating?
could we be stridulating?
could you be stridulating?
could they be stridulating? 	could I have stridulated?
could you have stridulated?
could she have stridulated?
could we have stridulated?
could you have stridulated?
could they have stridulated? 	could I have been stridulating?
could you have been stridulating?
could she have been stridulating?
could we have been stridulating?
could you have been stridulating?
could they have been stridulating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not stridulate?
could you not stridulate?
could she not stridulate?
could we not stridulate?
could you not stridulate?
could they not stridulate? 	could I not be stridulating?
could you not be stridulating?
could she not be stridulating?
could we not be stridulating?
could you not be stridulating?
could they not be stridulating? 	could I not have stridulated?
could you not have stridulated?
could she not have stridulated?
could we not have stridulated?
could you not have stridulated?
could they not have stridulated? 	could I not have been stridulating?
could you not have been stridulating?
could she not have been stridulating?
could we not have been stridulating?
could you not have been stridulating?
could they not have been stridulating?