could constrain
Verbe régulier : constrain - constrained- constrained
Traduction française : contraindre - forcer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could constrain
you could constrain
he could constrain
we could constrain
you could constrain
they could constrain 	I could be constraining
you could be constraining
he could be constraining
we could be constraining
you could be constraining
they could be constraining	I could have constrained
you could have constrained
he could have constrained
we could have constrained
you could have constrained
they could have constrained	I could have been constraining
you could have been constraining
he could have been constraining
we could have been constraining
you could have been constraining
they could have been constraining	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not constrain
you could not constrain
he could not constrain
we could not constrain
you could not constrain
they could not constrain 	I could not be constraining
you could not be constraining
he could not be constraining
we could not be constraining
you could not be constraining
they could not be constraining	I could not have constrained
you could not have constrained
he could not have constrained
we could not have constrained
you could not have constrained
they could not have constrained	I could not have been constraining
you could not have been constraining
he could not have been constraining
we could not have been constraining
you could not have been constraining
they could not have been constraining	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I constrain?
could you constrain?
could he constrain?
could we constrain?
could you constrain?
could they constrain? 	could I be constraining?
could you be constraining?
could he be constraining?
could we be constraining?
could you be constraining?
could they be constraining? 	could I have constrained?
could you have constrained?
could he have constrained?
could we have constrained?
could you have constrained?
could they have constrained? 	could I have been constraining?
could you have been constraining?
could he have been constraining?
could we have been constraining?
could you have been constraining?
could they have been constraining? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not constrain?
could you not constrain?
could he not constrain?
could we not constrain?
could you not constrain?
could they not constrain? 	could I not be constraining?
could you not be constraining?
could he not be constraining?
could we not be constraining?
could you not be constraining?
could they not be constraining? 	could I not have constrained?
could you not have constrained?
could he not have constrained?
could we not have constrained?
could you not have constrained?
could they not have constrained? 	could I not have been constraining?
could you not have been constraining?
could he not have been constraining?
could we not have been constraining?
could you not have been constraining?
could they not have been constraining?