English verb conjugation
CAN CONSTRAIN

Regular verb: constrain - constrained - constrained

Affirmation

Simple form	V-ing form
I can constrain you can constrain he can constrain we can constrain you can constrain they can constrain	I can be constraining you can be constraining he 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 he 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 he 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 he 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 he 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 he 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 he 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 he constrain? can we constrain? can you constrain? can they constrain?	can I be constraining? can you be constraining? can he 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 he 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 he 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 he 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 he 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 he 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 he have been constraining? can't we have been constraining? can't you have been constraining? can't they have been constraining?