I could buckle you could buckle he could buckle we could buckle you could buckle they could buckle
Forma con V-ing
I could be buckling you could be buckling he could be buckling we could be buckling you could be buckling they could be buckling
Perfecto
I could have buckled you could have buckled he could have buckled we could have buckled you could have buckled they could have buckled
Perfecto con V-ing
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
Negación
Forma simple
I couldn't buckle you couldn't buckle he couldn't buckle we couldn't buckle you couldn't buckle they couldn't buckle
Forma con V-ing
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
Perfecto
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
Perfecto con V-ing
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
could I buckle? could you buckle? could he buckle? could we buckle? could you buckle? could they buckle?
Forma con V-ing
could I be buckling? could you be buckling? could he be buckling? could we be buckling? could you be buckling? could they be buckling?
Perfecto
could I have buckled? could you have buckled? could he have buckled? could we have buckled? could you have buckled? could they have buckled?
Perfecto con V-ing
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-negativa
Forma simple
couldn't I buckle? couldn't you buckle? couldn't he buckle? couldn't we buckle? couldn't you buckle? couldn't they buckle?
Forma con V-ing
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?
Perfecto
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?
Perfecto con V-ing
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?