English verb conjugation
CAN CONSTRAIN

Regular verb: constrain - constrained - constrained

Affirmation

Simple form	V-ing form
I can constrain you can constrain she can constrain we can constrain you can constrain they can constrain	I can be constraining you can be constraining she can be constraining we can be constraining you can be constraining they can be constraining
Perfect	V-ing perfect
I can have constrained you can have constrained she can have constrained we can have constrained you can have constrained they can have constrained	I can have been constraining you can have been constraining she can have been constraining we can have been constraining you can have been constraining they can have been constraining

Negation

Simple form	V-ing form
I can't constrain you can't constrain she can't constrain we can't constrain you can't constrain they can't constrain	I can't be constraining you can't be constraining she can't be constraining we can't be constraining you can't be constraining they can't be constraining
Perfect	V-ing perfect
I can't have constrained you can't have constrained she can't have constrained we can't have constrained you can't have constrained they can't have constrained	I can't have been constraining you can't have been constraining she can't have been constraining we can't have been constraining you can't have been constraining they can't have been constraining

Interrogative form

Simple form	V-ing form
can I constrain? can you constrain? can she constrain? can we constrain? can you constrain? can they constrain?	can I be constraining? can you be constraining? can she be constraining? can we be constraining? can you be constraining? can they be constraining?
Perfect	V-ing perfect
can I have constrained? can you have constrained? can she have constrained? can we have constrained? can you have constrained? can they have constrained?	can I have been constraining? can you have been constraining? can she have been constraining? can we have been constraining? can you have been constraining? can they have been constraining?

Interro-negative form

Simple form	V-ing form
can't I constrain? can't you constrain? can't she constrain? can't we constrain? can't you constrain? can't they constrain?	can't I be constraining? can't you be constraining? can't she be constraining? can't we be constraining? can't you be constraining? can't they be constraining?
Perfect	V-ing perfect
can't I have constrained? can't you have constrained? can't she have constrained? can't we have constrained? can't you have constrained? can't they have constrained?	can't I have been constraining? can't you have been constraining? can't she have been constraining? can't we have been constraining? can't you have been constraining? can't they have been constraining?