could gem
Verbo regular: gem - gemed- gemed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could gem
you could gem
he could gem
we could gem
you could gem
they could gem 	I could be geming
you could be geming
he could be geming
we could be geming
you could be geming
they could be geming	I could have gemed
you could have gemed
he could have gemed
we could have gemed
you could have gemed
they could have gemed	I could have been geming
you could have been geming
he could have been geming
we could have been geming
you could have been geming
they could have been geming	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not gem
you could not gem
he could not gem
we could not gem
you could not gem
they could not gem 	I could not be geming
you could not be geming
he could not be geming
we could not be geming
you could not be geming
they could not be geming	I could not have gemed
you could not have gemed
he could not have gemed
we could not have gemed
you could not have gemed
they could not have gemed	I could not have been geming
you could not have been geming
he could not have been geming
we could not have been geming
you could not have been geming
they could not have been geming	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I gem?
could you gem?
could he gem?
could we gem?
could you gem?
could they gem? 	could I be geming?
could you be geming?
could he be geming?
could we be geming?
could you be geming?
could they be geming? 	could I have gemed?
could you have gemed?
could he have gemed?
could we have gemed?
could you have gemed?
could they have gemed? 	could I have been geming?
could you have been geming?
could he have been geming?
could we have been geming?
could you have been geming?
could they have been geming? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not gem?
could you not gem?
could he not gem?
could we not gem?
could you not gem?
could they not gem? 	could I not be geming?
could you not be geming?
could he not be geming?
could we not be geming?
could you not be geming?
could they not be geming? 	could I not have gemed?
could you not have gemed?
could he not have gemed?
could we not have gemed?
could you not have gemed?
could they not have gemed? 	could I not have been geming?
could you not have been geming?
could he not have been geming?
could we not have been geming?
could you not have been geming?
could they not have been geming?