could buckle
Verbo regular: buckle - buckled- buckled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could buckle
you could buckle
she could buckle
we could buckle
you could buckle
they could buckle 	I could be buckling
you could be buckling
she could be buckling
we could be buckling
you could be buckling
they could be buckling	I could have buckled
you could have buckled
she could have buckled
we could have buckled
you could have buckled
they could have buckled	I could have been buckling
you could have been buckling
she could have been buckling
we could have been buckling
you could have been buckling
they could have been buckling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not buckle
you could not buckle
she could not buckle
we could not buckle
you could not buckle
they could not buckle 	I could not be buckling
you could not be buckling
she could not be buckling
we could not be buckling
you could not be buckling
they could not be buckling	I could not have buckled
you could not have buckled
she could not have buckled
we could not have buckled
you could not have buckled
they could not have buckled	I could not have been buckling
you could not have been buckling
she could not have been buckling
we could not have been buckling
you could not have been buckling
they could not have been buckling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I buckle?
could you buckle?
could she buckle?
could we buckle?
could you buckle?
could they buckle? 	could I be buckling?
could you be buckling?
could she be buckling?
could we be buckling?
could you be buckling?
could they be buckling? 	could I have buckled?
could you have buckled?
could she have buckled?
could we have buckled?
could you have buckled?
could they have buckled? 	could I have been buckling?
could you have been buckling?
could she have been buckling?
could we have been buckling?
could you have been buckling?
could they have been buckling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not buckle?
could you not buckle?
could she not buckle?
could we not buckle?
could you not buckle?
could they not buckle? 	could I not be buckling?
could you not be buckling?
could she not be buckling?
could we not be buckling?
could you not be buckling?
could they not be buckling? 	could I not have buckled?
could you not have buckled?
could she not have buckled?
could we not have buckled?
could you not have buckled?
could they not have buckled? 	could I not have been buckling?
could you not have been buckling?
could she not have been buckling?
could we not have been buckling?
could you not have been buckling?
could they not have been buckling?