could overboil
Verbe régulier : overboil - overboiled- overboiled

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could overboil
you could overboil
he could overboil
we could overboil
you could overboil
they could overboil 	I could be overboiling
you could be overboiling
he could be overboiling
we could be overboiling
you could be overboiling
they could be overboiling	I could have overboiled
you could have overboiled
he could have overboiled
we could have overboiled
you could have overboiled
they could have overboiled	I could have been overboiling
you could have been overboiling
he could have been overboiling
we could have been overboiling
you could have been overboiling
they could have been overboiling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't overboil
you couldn't overboil
he couldn't overboil
we couldn't overboil
you couldn't overboil
they couldn't overboil 	I couldn't be overboiling
you couldn't be overboiling
he couldn't be overboiling
we couldn't be overboiling
you couldn't be overboiling
they couldn't be overboiling	I couldn't have overboiled
you couldn't have overboiled
he couldn't have overboiled
we couldn't have overboiled
you couldn't have overboiled
they couldn't have overboiled	I couldn't have been overboiling
you couldn't have been overboiling
he couldn't have been overboiling
we couldn't have been overboiling
you couldn't have been overboiling
they couldn't have been overboiling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I overboil?
could you overboil?
could he overboil?
could we overboil?
could you overboil?
could they overboil? 	could I be overboiling?
could you be overboiling?
could he be overboiling?
could we be overboiling?
could you be overboiling?
could they be overboiling? 	could I have overboiled?
could you have overboiled?
could he have overboiled?
could we have overboiled?
could you have overboiled?
could they have overboiled? 	could I have been overboiling?
could you have been overboiling?
could he have been overboiling?
could we have been overboiling?
could you have been overboiling?
could they have been overboiling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I overboil?
couldn't you overboil?
couldn't he overboil?
couldn't we overboil?
couldn't you overboil?
couldn't they overboil? 	couldn't I be overboiling?
couldn't you be overboiling?
couldn't he be overboiling?
couldn't we be overboiling?
couldn't you be overboiling?
couldn't they be overboiling? 	couldn't I have overboiled?
couldn't you have overboiled?
couldn't he have overboiled?
couldn't we have overboiled?
couldn't you have overboiled?
couldn't they have overboiled? 	couldn't I have been overboiling?
couldn't you have been overboiling?
couldn't he have been overboiling?
couldn't we have been overboiling?
couldn't you have been overboiling?
couldn't they have been overboiling?