could sulfonate
Verbo regolare: sulfonate - sulfonated- sulfonated

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could sulfonate
you could sulfonate
he could sulfonate
we could sulfonate
you could sulfonate
they could sulfonate 	I could be sulfonating
you could be sulfonating
he could be sulfonating
we could be sulfonating
you could be sulfonating
they could be sulfonating	I could have sulfonated
you could have sulfonated
he could have sulfonated
we could have sulfonated
you could have sulfonated
they could have sulfonated	I could have been sulfonating
you could have been sulfonating
he could have been sulfonating
we could have been sulfonating
you could have been sulfonating
they could have been sulfonating	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't sulfonate
you couldn't sulfonate
he couldn't sulfonate
we couldn't sulfonate
you couldn't sulfonate
they couldn't sulfonate 	I couldn't be sulfonating
you couldn't be sulfonating
he couldn't be sulfonating
we couldn't be sulfonating
you couldn't be sulfonating
they couldn't be sulfonating	I couldn't have sulfonated
you couldn't have sulfonated
he couldn't have sulfonated
we couldn't have sulfonated
you couldn't have sulfonated
they couldn't have sulfonated	I couldn't have been sulfonating
you couldn't have been sulfonating
he couldn't have been sulfonating
we couldn't have been sulfonating
you couldn't have been sulfonating
they couldn't have been sulfonating	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I sulfonate?
could you sulfonate?
could he sulfonate?
could we sulfonate?
could you sulfonate?
could they sulfonate? 	could I be sulfonating?
could you be sulfonating?
could he be sulfonating?
could we be sulfonating?
could you be sulfonating?
could they be sulfonating? 	could I have sulfonated?
could you have sulfonated?
could he have sulfonated?
could we have sulfonated?
could you have sulfonated?
could they have sulfonated? 	could I have been sulfonating?
could you have been sulfonating?
could he have been sulfonating?
could we have been sulfonating?
could you have been sulfonating?
could they have been sulfonating? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I sulfonate?
couldn't you sulfonate?
couldn't he sulfonate?
couldn't we sulfonate?
couldn't you sulfonate?
couldn't they sulfonate? 	couldn't I be sulfonating?
couldn't you be sulfonating?
couldn't he be sulfonating?
couldn't we be sulfonating?
couldn't you be sulfonating?
couldn't they be sulfonating? 	couldn't I have sulfonated?
couldn't you have sulfonated?
couldn't he have sulfonated?
couldn't we have sulfonated?
couldn't you have sulfonated?
couldn't they have sulfonated? 	couldn't I have been sulfonating?
couldn't you have been sulfonating?
couldn't he have been sulfonating?
couldn't we have been sulfonating?
couldn't you have been sulfonating?
couldn't they have been sulfonating?