could straiten
Verbe régulier : straiten - straitened- straitened

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could straiten
you could straiten
he could straiten
we could straiten
you could straiten
they could straiten 	I could be straitening
you could be straitening
he could be straitening
we could be straitening
you could be straitening
they could be straitening	I could have straitened
you could have straitened
he could have straitened
we could have straitened
you could have straitened
they could have straitened	I could have been straitening
you could have been straitening
he could have been straitening
we could have been straitening
you could have been straitening
they could have been straitening	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't straiten
you couldn't straiten
he couldn't straiten
we couldn't straiten
you couldn't straiten
they couldn't straiten 	I couldn't be straitening
you couldn't be straitening
he couldn't be straitening
we couldn't be straitening
you couldn't be straitening
they couldn't be straitening	I couldn't have straitened
you couldn't have straitened
he couldn't have straitened
we couldn't have straitened
you couldn't have straitened
they couldn't have straitened	I couldn't have been straitening
you couldn't have been straitening
he couldn't have been straitening
we couldn't have been straitening
you couldn't have been straitening
they couldn't have been straitening	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I straiten?
could you straiten?
could he straiten?
could we straiten?
could you straiten?
could they straiten? 	could I be straitening?
could you be straitening?
could he be straitening?
could we be straitening?
could you be straitening?
could they be straitening? 	could I have straitened?
could you have straitened?
could he have straitened?
could we have straitened?
could you have straitened?
could they have straitened? 	could I have been straitening?
could you have been straitening?
could he have been straitening?
could we have been straitening?
could you have been straitening?
could they have been straitening? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I straiten?
couldn't you straiten?
couldn't he straiten?
couldn't we straiten?
couldn't you straiten?
couldn't they straiten? 	couldn't I be straitening?
couldn't you be straitening?
couldn't he be straitening?
couldn't we be straitening?
couldn't you be straitening?
couldn't they be straitening? 	couldn't I have straitened?
couldn't you have straitened?
couldn't he have straitened?
couldn't we have straitened?
couldn't you have straitened?
couldn't they have straitened? 	couldn't I have been straitening?
couldn't you have been straitening?
couldn't he have been straitening?
couldn't we have been straitening?
couldn't you have been straitening?
couldn't they have been straitening?