English verb conjugation
CAN REFRAIN

Regular verb: refrain - refrained - refrained

Affirmation

Simple form	V-ing form
I can refrain you can refrain he can refrain we can refrain you can refrain they can refrain	I can be refraining you can be refraining he can be refraining we can be refraining you can be refraining they can be refraining
Perfect	V-ing perfect
I can have refrained you can have refrained he can have refrained we can have refrained you can have refrained they can have refrained	I can have been refraining you can have been refraining he can have been refraining we can have been refraining you can have been refraining they can have been refraining

Negation

Simple form	V-ing form
I cannot refrain you cannot refrain he cannot refrain we cannot refrain you cannot refrain they cannot refrain	I cannot be refraining you cannot be refraining he cannot be refraining we cannot be refraining you cannot be refraining they cannot be refraining
Perfect	V-ing perfect
I cannot have refrained you cannot have refrained he cannot have refrained we cannot have refrained you cannot have refrained they cannot have refrained	I cannot have been refraining you cannot have been refraining he cannot have been refraining we cannot have been refraining you cannot have been refraining they cannot have been refraining

Interrogative form

Simple form	V-ing form
can I refrain? can you refrain? can he refrain? can we refrain? can you refrain? can they refrain?	can I be refraining? can you be refraining? can he be refraining? can we be refraining? can you be refraining? can they be refraining?
Perfect	V-ing perfect
can I have refrained? can you have refrained? can he have refrained? can we have refrained? can you have refrained? can they have refrained?	can I have been refraining? can you have been refraining? can he have been refraining? can we have been refraining? can you have been refraining? can they have been refraining?

Interro-negative form

Simple form	V-ing form
can I not refrain? can you not refrain? can he not refrain? can we not refrain? can you not refrain? can they not refrain?	can I not be refraining? can you not be refraining? can he not be refraining? can we not be refraining? can you not be refraining? can they not be refraining?
Perfect	V-ing perfect
can I not have refrained? can you not have refrained? can he not have refrained? can we not have refrained? can you not have refrained? can they not have refrained?	can I not have been refraining? can you not have been refraining? can he not have been refraining? can we not have been refraining? can you not have been refraining? can they not have been refraining?