English verb conjugation
CAN STUFF

Regular verb: stuff - stuffed - stuffed

Affirmation

Simple form	V-ing form
I can stuff you can stuff he can stuff we can stuff you can stuff they can stuff	I can be stuffing you can be stuffing he can be stuffing we can be stuffing you can be stuffing they can be stuffing
Perfect	V-ing perfect
I can have stuffed you can have stuffed he can have stuffed we can have stuffed you can have stuffed they can have stuffed	I can have been stuffing you can have been stuffing he can have been stuffing we can have been stuffing you can have been stuffing they can have been stuffing

Negation

Simple form	V-ing form
I can't stuff you can't stuff he can't stuff we can't stuff you can't stuff they can't stuff	I can't be stuffing you can't be stuffing he can't be stuffing we can't be stuffing you can't be stuffing they can't be stuffing
Perfect	V-ing perfect
I can't have stuffed you can't have stuffed he can't have stuffed we can't have stuffed you can't have stuffed they can't have stuffed	I can't have been stuffing you can't have been stuffing he can't have been stuffing we can't have been stuffing you can't have been stuffing they can't have been stuffing

Interrogative form

Simple form	V-ing form
can I stuff? can you stuff? can he stuff? can we stuff? can you stuff? can they stuff?	can I be stuffing? can you be stuffing? can he be stuffing? can we be stuffing? can you be stuffing? can they be stuffing?
Perfect	V-ing perfect
can I have stuffed? can you have stuffed? can he have stuffed? can we have stuffed? can you have stuffed? can they have stuffed?	can I have been stuffing? can you have been stuffing? can he have been stuffing? can we have been stuffing? can you have been stuffing? can they have been stuffing?

Interro-negative form

Simple form	V-ing form
can't I stuff? can't you stuff? can't he stuff? can't we stuff? can't you stuff? can't they stuff?	can't I be stuffing? can't you be stuffing? can't he be stuffing? can't we be stuffing? can't you be stuffing? can't they be stuffing?
Perfect	V-ing perfect
can't I have stuffed? can't you have stuffed? can't he have stuffed? can't we have stuffed? can't you have stuffed? can't they have stuffed?	can't I have been stuffing? can't you have been stuffing? can't he have been stuffing? can't we have been stuffing? can't you have been stuffing? can't they have been stuffing?