can buckle
Verbo regular: buckle - buckled- buckled

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

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot buckle
you cannot buckle
he cannot buckle
we cannot buckle
you cannot buckle
they cannot buckle 	I cannot be buckling
you cannot be buckling
he cannot be buckling
we cannot be buckling
you cannot be buckling
they cannot be buckling	I cannot have buckled
you cannot have buckled
he cannot have buckled
we cannot have buckled
you cannot have buckled
they cannot have buckled	I cannot have been buckling
you cannot have been buckling
he cannot have been buckling
we cannot have been buckling
you cannot have been buckling
they cannot have been buckling	

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

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