English verb conjugation
CAN PERTURB

Regular verb: perturb - perturbed - perturbed

Affirmation

Simple form	V-ing form
I can perturb you can perturb she can perturb we can perturb you can perturb they can perturb	I can be perturbing you can be perturbing she can be perturbing we can be perturbing you can be perturbing they can be perturbing
Perfect	V-ing perfect
I can have perturbed you can have perturbed she can have perturbed we can have perturbed you can have perturbed they can have perturbed	I can have been perturbing you can have been perturbing she can have been perturbing we can have been perturbing you can have been perturbing they can have been perturbing

Negation

Simple form	V-ing form
I cannot perturb you cannot perturb she cannot perturb we cannot perturb you cannot perturb they cannot perturb	I cannot be perturbing you cannot be perturbing she cannot be perturbing we cannot be perturbing you cannot be perturbing they cannot be perturbing
Perfect	V-ing perfect
I cannot have perturbed you cannot have perturbed she cannot have perturbed we cannot have perturbed you cannot have perturbed they cannot have perturbed	I cannot have been perturbing you cannot have been perturbing she cannot have been perturbing we cannot have been perturbing you cannot have been perturbing they cannot have been perturbing

Interrogative form

Simple form	V-ing form
can I perturb? can you perturb? can she perturb? can we perturb? can you perturb? can they perturb?	can I be perturbing? can you be perturbing? can she be perturbing? can we be perturbing? can you be perturbing? can they be perturbing?
Perfect	V-ing perfect
can I have perturbed? can you have perturbed? can she have perturbed? can we have perturbed? can you have perturbed? can they have perturbed?	can I have been perturbing? can you have been perturbing? can she have been perturbing? can we have been perturbing? can you have been perturbing? can they have been perturbing?

Interro-negative form

Simple form	V-ing form
can I not perturb? can you not perturb? can she not perturb? can we not perturb? can you not perturb? can they not perturb?	can I not be perturbing? can you not be perturbing? can she not be perturbing? can we not be perturbing? can you not be perturbing? can they not be perturbing?
Perfect	V-ing perfect
can I not have perturbed? can you not have perturbed? can she not have perturbed? can we not have perturbed? can you not have perturbed? can they not have perturbed?	can I not have been perturbing? can you not have been perturbing? can she not have been perturbing? can we not have been perturbing? can you not have been perturbing? can they not have been perturbing?