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
he could buckle
we could buckle
you could buckle
they could buckle 	I could be buckling
you could be buckling
he could be buckling
we could be buckling
you could be buckling
they could be buckling	I could have buckled
you could have buckled
he 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
he 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 couldn't buckle
you couldn't buckle
he couldn't buckle
we couldn't buckle
you couldn't buckle
they couldn't buckle 	I couldn't be buckling
you couldn't be buckling
he couldn't be buckling
we couldn't be buckling
you couldn't be buckling
they couldn't be buckling	I couldn't have buckled
you couldn't have buckled
he couldn't have buckled
we couldn't have buckled
you couldn't have buckled
they couldn't have buckled	I couldn't have been buckling
you couldn't have been buckling
he couldn't have been buckling
we couldn't have been buckling
you couldn't have been buckling
they couldn't have been buckling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I buckle?
could you buckle?
could he buckle?
could we buckle?
could you buckle?
could they buckle? 	could I be buckling?
could you be buckling?
could he be buckling?
could we be buckling?
could you be buckling?
could they be buckling? 	could I have buckled?
could you have buckled?
could he 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 he 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 	
couldn't I buckle?
couldn't you buckle?
couldn't he buckle?
couldn't we buckle?
couldn't you buckle?
couldn't they buckle? 	couldn't I be buckling?
couldn't you be buckling?
couldn't he be buckling?
couldn't we be buckling?
couldn't you be buckling?
couldn't they be buckling? 	couldn't I have buckled?
couldn't you have buckled?
couldn't he have buckled?
couldn't we have buckled?
couldn't you have buckled?
couldn't they have buckled? 	couldn't I have been buckling?
couldn't you have been buckling?
couldn't he have been buckling?
couldn't we have been buckling?
couldn't you have been buckling?
couldn't they have been buckling?