could serge
Verbo regular: serge - serged- serged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could serge
you could serge
he could serge
we could serge
you could serge
they could serge 	I could be serging
you could be serging
he could be serging
we could be serging
you could be serging
they could be serging	I could have serged
you could have serged
he could have serged
we could have serged
you could have serged
they could have serged	I could have been serging
you could have been serging
he could have been serging
we could have been serging
you could have been serging
they could have been serging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not serge
you could not serge
he could not serge
we could not serge
you could not serge
they could not serge 	I could not be serging
you could not be serging
he could not be serging
we could not be serging
you could not be serging
they could not be serging	I could not have serged
you could not have serged
he could not have serged
we could not have serged
you could not have serged
they could not have serged	I could not have been serging
you could not have been serging
he could not have been serging
we could not have been serging
you could not have been serging
they could not have been serging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I serge?
could you serge?
could he serge?
could we serge?
could you serge?
could they serge? 	could I be serging?
could you be serging?
could he be serging?
could we be serging?
could you be serging?
could they be serging? 	could I have serged?
could you have serged?
could he have serged?
could we have serged?
could you have serged?
could they have serged? 	could I have been serging?
could you have been serging?
could he have been serging?
could we have been serging?
could you have been serging?
could they have been serging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not serge?
could you not serge?
could he not serge?
could we not serge?
could you not serge?
could they not serge? 	could I not be serging?
could you not be serging?
could he not be serging?
could we not be serging?
could you not be serging?
could they not be serging? 	could I not have serged?
could you not have serged?
could he not have serged?
could we not have serged?
could you not have serged?
could they not have serged? 	could I not have been serging?
could you not have been serging?
could he not have been serging?
could we not have been serging?
could you not have been serging?
could they not have been serging?