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
she could drop
we could drop
you could drop
they could drop 	I could be dropping
you could be dropping
she could be dropping
we could be dropping
you could be dropping
they could be dropping	I could have dropped
you could have dropped
she 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
she 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
she 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
she 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
she 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
she 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 she drop?
could we drop?
could you drop?
could they drop? 	could I be dropping?
could you be dropping?
could she be dropping?
could we be dropping?
could you be dropping?
could they be dropping? 	could I have dropped?
could you have dropped?
could she 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 she 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 she 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 she 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 she 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 she have been dropping?
couldn't we have been dropping?
couldn't you have been dropping?
couldn't they have been dropping?