English verb conjugation
CAN CREASE

Regular verb: crease - creased - creased

Affirmation

Simple form	V-ing form
I can crease you can crease he can crease we can crease you can crease they can crease	I can be creasing you can be creasing he can be creasing we can be creasing you can be creasing they can be creasing
Perfect	V-ing perfect
I can have creased you can have creased he can have creased we can have creased you can have creased they can have creased	I can have been creasing you can have been creasing he can have been creasing we can have been creasing you can have been creasing they can have been creasing

Negation

Simple form	V-ing form
I can't crease you can't crease he can't crease we can't crease you can't crease they can't crease	I can't be creasing you can't be creasing he can't be creasing we can't be creasing you can't be creasing they can't be creasing
Perfect	V-ing perfect
I can't have creased you can't have creased he can't have creased we can't have creased you can't have creased they can't have creased	I can't have been creasing you can't have been creasing he can't have been creasing we can't have been creasing you can't have been creasing they can't have been creasing

Interrogative form

Simple form	V-ing form
can I crease? can you crease? can he crease? can we crease? can you crease? can they crease?	can I be creasing? can you be creasing? can he be creasing? can we be creasing? can you be creasing? can they be creasing?
Perfect	V-ing perfect
can I have creased? can you have creased? can he have creased? can we have creased? can you have creased? can they have creased?	can I have been creasing? can you have been creasing? can he have been creasing? can we have been creasing? can you have been creasing? can they have been creasing?

Interro-negative form

Simple form	V-ing form
can't I crease? can't you crease? can't he crease? can't we crease? can't you crease? can't they crease?	can't I be creasing? can't you be creasing? can't he be creasing? can't we be creasing? can't you be creasing? can't they be creasing?
Perfect	V-ing perfect
can't I have creased? can't you have creased? can't he have creased? can't we have creased? can't you have creased? can't they have creased?	can't I have been creasing? can't you have been creasing? can't he have been creasing? can't we have been creasing? can't you have been creasing? can't they have been creasing?