English verb conjugation
CAN MASS

Regular verb: mass - massed - massed

Affirmation

Simple form	V-ing form
I can mass you can mass she can mass we can mass you can mass they can mass	I can be massing you can be massing she can be massing we can be massing you can be massing they can be massing
Perfect	V-ing perfect
I can have massed you can have massed she can have massed we can have massed you can have massed they can have massed	I can have been massing you can have been massing she can have been massing we can have been massing you can have been massing they can have been massing

Negation

Simple form	V-ing form
I cannot mass you cannot mass she cannot mass we cannot mass you cannot mass they cannot mass	I cannot be massing you cannot be massing she cannot be massing we cannot be massing you cannot be massing they cannot be massing
Perfect	V-ing perfect
I cannot have massed you cannot have massed she cannot have massed we cannot have massed you cannot have massed they cannot have massed	I cannot have been massing you cannot have been massing she cannot have been massing we cannot have been massing you cannot have been massing they cannot have been massing

Interrogative form

Simple form	V-ing form
can I mass? can you mass? can she mass? can we mass? can you mass? can they mass?	can I be massing? can you be massing? can she be massing? can we be massing? can you be massing? can they be massing?
Perfect	V-ing perfect
can I have massed? can you have massed? can she have massed? can we have massed? can you have massed? can they have massed?	can I have been massing? can you have been massing? can she have been massing? can we have been massing? can you have been massing? can they have been massing?

Interro-negative form

Simple form	V-ing form
can I not mass? can you not mass? can she not mass? can we not mass? can you not mass? can they not mass?	can I not be massing? can you not be massing? can she not be massing? can we not be massing? can you not be massing? can they not be massing?
Perfect	V-ing perfect
can I not have massed? can you not have massed? can she not have massed? can we not have massed? can you not have massed? can they not have massed?	can I not have been massing? can you not have been massing? can she not have been massing? can we not have been massing? can you not have been massing? can they not have been massing?