could smoothen
Verbe régulier : smoothen - smoothened- smoothened

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could smoothen
you could smoothen
she could smoothen
we could smoothen
you could smoothen
they could smoothen 	I could be smoothening
you could be smoothening
she could be smoothening
we could be smoothening
you could be smoothening
they could be smoothening	I could have smoothened
you could have smoothened
she could have smoothened
we could have smoothened
you could have smoothened
they could have smoothened	I could have been smoothening
you could have been smoothening
she could have been smoothening
we could have been smoothening
you could have been smoothening
they could have been smoothening	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't smoothen
you couldn't smoothen
she couldn't smoothen
we couldn't smoothen
you couldn't smoothen
they couldn't smoothen 	I couldn't be smoothening
you couldn't be smoothening
she couldn't be smoothening
we couldn't be smoothening
you couldn't be smoothening
they couldn't be smoothening	I couldn't have smoothened
you couldn't have smoothened
she couldn't have smoothened
we couldn't have smoothened
you couldn't have smoothened
they couldn't have smoothened	I couldn't have been smoothening
you couldn't have been smoothening
she couldn't have been smoothening
we couldn't have been smoothening
you couldn't have been smoothening
they couldn't have been smoothening	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I smoothen?
could you smoothen?
could she smoothen?
could we smoothen?
could you smoothen?
could they smoothen? 	could I be smoothening?
could you be smoothening?
could she be smoothening?
could we be smoothening?
could you be smoothening?
could they be smoothening? 	could I have smoothened?
could you have smoothened?
could she have smoothened?
could we have smoothened?
could you have smoothened?
could they have smoothened? 	could I have been smoothening?
could you have been smoothening?
could she have been smoothening?
could we have been smoothening?
could you have been smoothening?
could they have been smoothening? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I smoothen?
couldn't you smoothen?
couldn't she smoothen?
couldn't we smoothen?
couldn't you smoothen?
couldn't they smoothen? 	couldn't I be smoothening?
couldn't you be smoothening?
couldn't she be smoothening?
couldn't we be smoothening?
couldn't you be smoothening?
couldn't they be smoothening? 	couldn't I have smoothened?
couldn't you have smoothened?
couldn't she have smoothened?
couldn't we have smoothened?
couldn't you have smoothened?
couldn't they have smoothened? 	couldn't I have been smoothening?
couldn't you have been smoothening?
couldn't she have been smoothening?
couldn't we have been smoothening?
couldn't you have been smoothening?
couldn't they have been smoothening?