can serge
Verbo regular: serge - serged- serged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can serge
you can serge
he can serge
we can serge
you can serge
they can serge 	I can be serging
you can be serging
he can be serging
we can be serging
you can be serging
they can be serging	I can have serged
you can have serged
he can have serged
we can have serged
you can have serged
they can have serged	I can have been serging
you can have been serging
he can have been serging
we can have been serging
you can have been serging
they can have been serging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot serge
you cannot serge
he cannot serge
we cannot serge
you cannot serge
they cannot serge 	I cannot be serging
you cannot be serging
he cannot be serging
we cannot be serging
you cannot be serging
they cannot be serging	I cannot have serged
you cannot have serged
he cannot have serged
we cannot have serged
you cannot have serged
they cannot have serged	I cannot have been serging
you cannot have been serging
he cannot have been serging
we cannot have been serging
you cannot have been serging
they cannot have been serging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I serge?
can you serge?
can he serge?
can we serge?
can you serge?
can they serge? 	can I be serging?
can you be serging?
can he be serging?
can we be serging?
can you be serging?
can they be serging? 	can I have serged?
can you have serged?
can he have serged?
can we have serged?
can you have serged?
can they have serged? 	can I have been serging?
can you have been serging?
can he have been serging?
can we have been serging?
can you have been serging?
can they have been serging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not serge?
can you not serge?
can he not serge?
can we not serge?
can you not serge?
can they not serge? 	can I not be serging?
can you not be serging?
can he not be serging?
can we not be serging?
can you not be serging?
can they not be serging? 	can I not have serged?
can you not have serged?
can he not have serged?
can we not have serged?
can you not have serged?
can they not have serged? 	can I not have been serging?
can you not have been serging?
can he not have been serging?
can we not have been serging?
can you not have been serging?
can they not have been serging?