Conjugación del verbo inglés
COULD SEEM

Verbo regular: seem - seemed - seemed

Afirmación

Forma simple	Forma con V-ing
- - it could seem - - -	- - it could be seeming - - -
Perfecto	Perfecto con V-ing
- - it could have seemed - - -	- - it could have been seeming - - -

Negación

Forma simple	Forma con V-ing
- - it couldn't seem - - -	- - it couldn't be seeming - - -
Perfecto	Perfecto con V-ing
- - it couldn't have seemed - - -	- - it couldn't have been seeming - - -

Forma interrogativa

Forma simple	Forma con V-ing
- - could it seem? - - -	- - could it be seeming? - - -
Perfecto	Perfecto con V-ing
- - could it have seemed? - - -	- - could it have been seeming? - - -

Forma interro-negativa

Forma simple	Forma con V-ing
- - couldn't it seem? - - -	- - couldn't it be seeming? - - -
Perfecto	Perfecto con V-ing
- - couldn't it have seemed? - - -	- - couldn't it have been seeming? - - -