English verb conjugation
CAN MASS

Regular verb: mass - massed - massed

Affirmation

Simple form	V-ing form
I can mass you can mass he can mass we can mass you can mass they can mass	I can be massing you can be massing he 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 he 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 he 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 can't mass you can't mass he can't mass we can't mass you can't mass they can't mass	I can't be massing you can't be massing he can't be massing we can't be massing you can't be massing they can't be massing
Perfect	V-ing perfect
I can't have massed you can't have massed he can't have massed we can't have massed you can't have massed they can't have massed	I can't have been massing you can't have been massing he can't have been massing we can't have been massing you can't have been massing they can't have been massing

Interrogative form

Simple form	V-ing form
can I mass? can you mass? can he mass? can we mass? can you mass? can they mass?	can I be massing? can you be massing? can he 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 he 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 he 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't I mass? can't you mass? can't he mass? can't we mass? can't you mass? can't they mass?	can't I be massing? can't you be massing? can't he be massing? can't we be massing? can't you be massing? can't they be massing?
Perfect	V-ing perfect
can't I have massed? can't you have massed? can't he have massed? can't we have massed? can't you have massed? can't they have massed?	can't I have been massing? can't you have been massing? can't he have been massing? can't we have been massing? can't you have been massing? can't they have been massing?