may constrain
Regular verb: constrain - constrained- constrained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may constrain
you may constrain
he may constrain
we may constrain
you may constrain
they may constrain 	I may be constraining
you may be constraining
he may be constraining
we may be constraining
you may be constraining
they may be constraining	I may have constrained
you may have constrained
he may have constrained
we may have constrained
you may have constrained
they may have constrained	I may have been constraining
you may have been constraining
he may have been constraining
we may have been constraining
you may have been constraining
they may have been constraining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not constrain
you may not constrain
he may not constrain
we may not constrain
you may not constrain
they may not constrain 	I may not be constraining
you may not be constraining
he may not be constraining
we may not be constraining
you may not be constraining
they may not be constraining	I may not have constrained
you may not have constrained
he may not have constrained
we may not have constrained
you may not have constrained
they may not have constrained	I may not have been constraining
you may not have been constraining
he may not have been constraining
we may not have been constraining
you may not have been constraining
they may not have been constraining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I constrain?
may you constrain?
may he constrain?
may we constrain?
may you constrain?
may they constrain? 	may I be constraining?
may you be constraining?
may he be constraining?
may we be constraining?
may you be constraining?
may they be constraining? 	may I have constrained?
may you have constrained?
may he have constrained?
may we have constrained?
may you have constrained?
may they have constrained? 	may I have been constraining?
may you have been constraining?
may he have been constraining?
may we have been constraining?
may you have been constraining?
may they have been constraining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not constrain?
may you not constrain?
may he not constrain?
may we not constrain?
may you not constrain?
may they not constrain? 	may I not be constraining?
may you not be constraining?
may he not be constraining?
may we not be constraining?
may you not be constraining?
may they not be constraining? 	may I not have constrained?
may you not have constrained?
may he not have constrained?
may we not have constrained?
may you not have constrained?
may they not have constrained? 	may I not have been constraining?
may you not have been constraining?
may he not have been constraining?
may we not have been constraining?
may you not have been constraining?
may they not have been constraining?