could drop
Verbo regular: drop - dropped- dropped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could drop
you could drop
he could drop
we could drop
you could drop
they could drop 	I could be dropping
you could be dropping
he could be dropping
we could be dropping
you could be dropping
they could be dropping	I could have dropped
you could have dropped
he could have dropped
we could have dropped
you could have dropped
they could have dropped	I could have been dropping
you could have been dropping
he could have been dropping
we could have been dropping
you could have been dropping
they could have been dropping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't drop
you couldn't drop
he couldn't drop
we couldn't drop
you couldn't drop
they couldn't drop 	I couldn't be dropping
you couldn't be dropping
he couldn't be dropping
we couldn't be dropping
you couldn't be dropping
they couldn't be dropping	I couldn't have dropped
you couldn't have dropped
he couldn't have dropped
we couldn't have dropped
you couldn't have dropped
they couldn't have dropped	I couldn't have been dropping
you couldn't have been dropping
he couldn't have been dropping
we couldn't have been dropping
you couldn't have been dropping
they couldn't have been dropping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I drop?
could you drop?
could he drop?
could we drop?
could you drop?
could they drop? 	could I be dropping?
could you be dropping?
could he be dropping?
could we be dropping?
could you be dropping?
could they be dropping? 	could I have dropped?
could you have dropped?
could he have dropped?
could we have dropped?
could you have dropped?
could they have dropped? 	could I have been dropping?
could you have been dropping?
could he have been dropping?
could we have been dropping?
could you have been dropping?
could they have been dropping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I drop?
couldn't you drop?
couldn't he drop?
couldn't we drop?
couldn't you drop?
couldn't they drop? 	couldn't I be dropping?
couldn't you be dropping?
couldn't he be dropping?
couldn't we be dropping?
couldn't you be dropping?
couldn't they be dropping? 	couldn't I have dropped?
couldn't you have dropped?
couldn't he have dropped?
couldn't we have dropped?
couldn't you have dropped?
couldn't they have dropped? 	couldn't I have been dropping?
couldn't you have been dropping?
couldn't he have been dropping?
couldn't we have been dropping?
couldn't you have been dropping?
couldn't they have been dropping?