could lift
Verbo regular: lift - lifted- lifted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could lift
you could lift
she could lift
we could lift
you could lift
they could lift 	I could be lifting
you could be lifting
she could be lifting
we could be lifting
you could be lifting
they could be lifting	I could have lifted
you could have lifted
she could have lifted
we could have lifted
you could have lifted
they could have lifted	I could have been lifting
you could have been lifting
she could have been lifting
we could have been lifting
you could have been lifting
they could have been lifting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't lift
you couldn't lift
she couldn't lift
we couldn't lift
you couldn't lift
they couldn't lift 	I couldn't be lifting
you couldn't be lifting
she couldn't be lifting
we couldn't be lifting
you couldn't be lifting
they couldn't be lifting	I couldn't have lifted
you couldn't have lifted
she couldn't have lifted
we couldn't have lifted
you couldn't have lifted
they couldn't have lifted	I couldn't have been lifting
you couldn't have been lifting
she couldn't have been lifting
we couldn't have been lifting
you couldn't have been lifting
they couldn't have been lifting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I lift?
could you lift?
could she lift?
could we lift?
could you lift?
could they lift? 	could I be lifting?
could you be lifting?
could she be lifting?
could we be lifting?
could you be lifting?
could they be lifting? 	could I have lifted?
could you have lifted?
could she have lifted?
could we have lifted?
could you have lifted?
could they have lifted? 	could I have been lifting?
could you have been lifting?
could she have been lifting?
could we have been lifting?
could you have been lifting?
could they have been lifting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I lift?
couldn't you lift?
couldn't she lift?
couldn't we lift?
couldn't you lift?
couldn't they lift? 	couldn't I be lifting?
couldn't you be lifting?
couldn't she be lifting?
couldn't we be lifting?
couldn't you be lifting?
couldn't they be lifting? 	couldn't I have lifted?
couldn't you have lifted?
couldn't she have lifted?
couldn't we have lifted?
couldn't you have lifted?
couldn't they have lifted? 	couldn't I have been lifting?
couldn't you have been lifting?
couldn't she have been lifting?
couldn't we have been lifting?
couldn't you have been lifting?
couldn't they have been lifting?