English verb conjugation
CAN UM

Regular verb: um - umed - umed

Affirmation

Simple form	V-ing form
I can um you can um he can um we can um you can um they can um	I can be uming you can be uming he can be uming we can be uming you can be uming they can be uming
Perfect	V-ing perfect
I can have umed you can have umed he can have umed we can have umed you can have umed they can have umed	I can have been uming you can have been uming he can have been uming we can have been uming you can have been uming they can have been uming

Negation

Simple form	V-ing form
I cannot um you cannot um he cannot um we cannot um you cannot um they cannot um	I cannot be uming you cannot be uming he cannot be uming we cannot be uming you cannot be uming they cannot be uming
Perfect	V-ing perfect
I cannot have umed you cannot have umed he cannot have umed we cannot have umed you cannot have umed they cannot have umed	I cannot have been uming you cannot have been uming he cannot have been uming we cannot have been uming you cannot have been uming they cannot have been uming

Interrogative form

Simple form	V-ing form
can I um? can you um? can he um? can we um? can you um? can they um?	can I be uming? can you be uming? can he be uming? can we be uming? can you be uming? can they be uming?
Perfect	V-ing perfect
can I have umed? can you have umed? can he have umed? can we have umed? can you have umed? can they have umed?	can I have been uming? can you have been uming? can he have been uming? can we have been uming? can you have been uming? can they have been uming?

Interro-negative form

Simple form	V-ing form
can I not um? can you not um? can he not um? can we not um? can you not um? can they not um?	can I not be uming? can you not be uming? can he not be uming? can we not be uming? can you not be uming? can they not be uming?
Perfect	V-ing perfect
can I not have umed? can you not have umed? can he not have umed? can we not have umed? can you not have umed? can they not have umed?	can I not have been uming? can you not have been uming? can he not have been uming? can we not have been uming? can you not have been uming? can they not have been uming?