English verb conjugation
CAN CURB

Regular verb: curb - curbed - curbed

Affirmation

Simple form	V-ing form
I can curb you can curb she can curb we can curb you can curb they can curb	I can be curbing you can be curbing she can be curbing we can be curbing you can be curbing they can be curbing
Perfect	V-ing perfect
I can have curbed you can have curbed she can have curbed we can have curbed you can have curbed they can have curbed	I can have been curbing you can have been curbing she can have been curbing we can have been curbing you can have been curbing they can have been curbing

Negation

Simple form	V-ing form
I cannot curb you cannot curb she cannot curb we cannot curb you cannot curb they cannot curb	I cannot be curbing you cannot be curbing she cannot be curbing we cannot be curbing you cannot be curbing they cannot be curbing
Perfect	V-ing perfect
I cannot have curbed you cannot have curbed she cannot have curbed we cannot have curbed you cannot have curbed they cannot have curbed	I cannot have been curbing you cannot have been curbing she cannot have been curbing we cannot have been curbing you cannot have been curbing they cannot have been curbing

Interrogative form

Simple form	V-ing form
can I curb? can you curb? can she curb? can we curb? can you curb? can they curb?	can I be curbing? can you be curbing? can she be curbing? can we be curbing? can you be curbing? can they be curbing?
Perfect	V-ing perfect
can I have curbed? can you have curbed? can she have curbed? can we have curbed? can you have curbed? can they have curbed?	can I have been curbing? can you have been curbing? can she have been curbing? can we have been curbing? can you have been curbing? can they have been curbing?

Interro-negative form

Simple form	V-ing form
can I not curb? can you not curb? can she not curb? can we not curb? can you not curb? can they not curb?	can I not be curbing? can you not be curbing? can she not be curbing? can we not be curbing? can you not be curbing? can they not be curbing?
Perfect	V-ing perfect
can I not have curbed? can you not have curbed? can she not have curbed? can we not have curbed? can you not have curbed? can they not have curbed?	can I not have been curbing? can you not have been curbing? can she not have been curbing? can we not have been curbing? can you not have been curbing? can they not have been curbing?