could serotype
Verbo regular: serotype - serotyped- serotyped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could serotype
you could serotype
he could serotype
we could serotype
you could serotype
they could serotype 	I could be serotyping
you could be serotyping
he could be serotyping
we could be serotyping
you could be serotyping
they could be serotyping	I could have serotyped
you could have serotyped
he could have serotyped
we could have serotyped
you could have serotyped
they could have serotyped	I could have been serotyping
you could have been serotyping
he could have been serotyping
we could have been serotyping
you could have been serotyping
they could have been serotyping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't serotype
you couldn't serotype
he couldn't serotype
we couldn't serotype
you couldn't serotype
they couldn't serotype 	I couldn't be serotyping
you couldn't be serotyping
he couldn't be serotyping
we couldn't be serotyping
you couldn't be serotyping
they couldn't be serotyping	I couldn't have serotyped
you couldn't have serotyped
he couldn't have serotyped
we couldn't have serotyped
you couldn't have serotyped
they couldn't have serotyped	I couldn't have been serotyping
you couldn't have been serotyping
he couldn't have been serotyping
we couldn't have been serotyping
you couldn't have been serotyping
they couldn't have been serotyping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I serotype?
could you serotype?
could he serotype?
could we serotype?
could you serotype?
could they serotype? 	could I be serotyping?
could you be serotyping?
could he be serotyping?
could we be serotyping?
could you be serotyping?
could they be serotyping? 	could I have serotyped?
could you have serotyped?
could he have serotyped?
could we have serotyped?
could you have serotyped?
could they have serotyped? 	could I have been serotyping?
could you have been serotyping?
could he have been serotyping?
could we have been serotyping?
could you have been serotyping?
could they have been serotyping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I serotype?
couldn't you serotype?
couldn't he serotype?
couldn't we serotype?
couldn't you serotype?
couldn't they serotype? 	couldn't I be serotyping?
couldn't you be serotyping?
couldn't he be serotyping?
couldn't we be serotyping?
couldn't you be serotyping?
couldn't they be serotyping? 	couldn't I have serotyped?
couldn't you have serotyped?
couldn't he have serotyped?
couldn't we have serotyped?
couldn't you have serotyped?
couldn't they have serotyped? 	couldn't I have been serotyping?
couldn't you have been serotyping?
couldn't he have been serotyping?
couldn't we have been serotyping?
couldn't you have been serotyping?
couldn't they have been serotyping?