could crinkle
Verbo regular: crinkle - crinkled- crinkled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could crinkle
you could crinkle
he could crinkle
we could crinkle
you could crinkle
they could crinkle 	I could be crinkling
you could be crinkling
he could be crinkling
we could be crinkling
you could be crinkling
they could be crinkling	I could have crinkled
you could have crinkled
he could have crinkled
we could have crinkled
you could have crinkled
they could have crinkled	I could have been crinkling
you could have been crinkling
he could have been crinkling
we could have been crinkling
you could have been crinkling
they could have been crinkling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't crinkle
you couldn't crinkle
he couldn't crinkle
we couldn't crinkle
you couldn't crinkle
they couldn't crinkle 	I couldn't be crinkling
you couldn't be crinkling
he couldn't be crinkling
we couldn't be crinkling
you couldn't be crinkling
they couldn't be crinkling	I couldn't have crinkled
you couldn't have crinkled
he couldn't have crinkled
we couldn't have crinkled
you couldn't have crinkled
they couldn't have crinkled	I couldn't have been crinkling
you couldn't have been crinkling
he couldn't have been crinkling
we couldn't have been crinkling
you couldn't have been crinkling
they couldn't have been crinkling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I crinkle?
could you crinkle?
could he crinkle?
could we crinkle?
could you crinkle?
could they crinkle? 	could I be crinkling?
could you be crinkling?
could he be crinkling?
could we be crinkling?
could you be crinkling?
could they be crinkling? 	could I have crinkled?
could you have crinkled?
could he have crinkled?
could we have crinkled?
could you have crinkled?
could they have crinkled? 	could I have been crinkling?
could you have been crinkling?
could he have been crinkling?
could we have been crinkling?
could you have been crinkling?
could they have been crinkling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I crinkle?
couldn't you crinkle?
couldn't he crinkle?
couldn't we crinkle?
couldn't you crinkle?
couldn't they crinkle? 	couldn't I be crinkling?
couldn't you be crinkling?
couldn't he be crinkling?
couldn't we be crinkling?
couldn't you be crinkling?
couldn't they be crinkling? 	couldn't I have crinkled?
couldn't you have crinkled?
couldn't he have crinkled?
couldn't we have crinkled?
couldn't you have crinkled?
couldn't they have crinkled? 	couldn't I have been crinkling?
couldn't you have been crinkling?
couldn't he have been crinkling?
couldn't we have been crinkling?
couldn't you have been crinkling?
couldn't they have been crinkling?