could preboil
Verbe régulier : preboil - preboiled- preboiled

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could preboil
you could preboil
he could preboil
we could preboil
you could preboil
they could preboil 	I could be preboiling
you could be preboiling
he could be preboiling
we could be preboiling
you could be preboiling
they could be preboiling	I could have preboiled
you could have preboiled
he could have preboiled
we could have preboiled
you could have preboiled
they could have preboiled	I could have been preboiling
you could have been preboiling
he could have been preboiling
we could have been preboiling
you could have been preboiling
they could have been preboiling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't preboil
you couldn't preboil
he couldn't preboil
we couldn't preboil
you couldn't preboil
they couldn't preboil 	I couldn't be preboiling
you couldn't be preboiling
he couldn't be preboiling
we couldn't be preboiling
you couldn't be preboiling
they couldn't be preboiling	I couldn't have preboiled
you couldn't have preboiled
he couldn't have preboiled
we couldn't have preboiled
you couldn't have preboiled
they couldn't have preboiled	I couldn't have been preboiling
you couldn't have been preboiling
he couldn't have been preboiling
we couldn't have been preboiling
you couldn't have been preboiling
they couldn't have been preboiling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I preboil?
could you preboil?
could he preboil?
could we preboil?
could you preboil?
could they preboil? 	could I be preboiling?
could you be preboiling?
could he be preboiling?
could we be preboiling?
could you be preboiling?
could they be preboiling? 	could I have preboiled?
could you have preboiled?
could he have preboiled?
could we have preboiled?
could you have preboiled?
could they have preboiled? 	could I have been preboiling?
could you have been preboiling?
could he have been preboiling?
could we have been preboiling?
could you have been preboiling?
could they have been preboiling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I preboil?
couldn't you preboil?
couldn't he preboil?
couldn't we preboil?
couldn't you preboil?
couldn't they preboil? 	couldn't I be preboiling?
couldn't you be preboiling?
couldn't he be preboiling?
couldn't we be preboiling?
couldn't you be preboiling?
couldn't they be preboiling? 	couldn't I have preboiled?
couldn't you have preboiled?
couldn't he have preboiled?
couldn't we have preboiled?
couldn't you have preboiled?
couldn't they have preboiled? 	couldn't I have been preboiling?
couldn't you have been preboiling?
couldn't he have been preboiling?
couldn't we have been preboiling?
couldn't you have been preboiling?
couldn't they have been preboiling?