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 cannot crease you cannot crease he cannot crease we cannot crease you cannot crease they cannot crease	I cannot be creasing you cannot be creasing he cannot be creasing we cannot be creasing you cannot be creasing they cannot be creasing
Perfect	V-ing perfect
I cannot have creased you cannot have creased he cannot have creased we cannot have creased you cannot have creased they cannot have creased	I cannot have been creasing you cannot have been creasing he cannot have been creasing we cannot have been creasing you cannot have been creasing they cannot 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 I not crease? can you not crease? can he not crease? can we not crease? can you not crease? can they not crease?	can I not be creasing? can you not be creasing? can he not be creasing? can we not be creasing? can you not be creasing? can they not be creasing?
Perfect	V-ing perfect
can I not have creased? can you not have creased? can he not have creased? can we not have creased? can you not have creased? can they not have creased?	can I not have been creasing? can you not have been creasing? can he not have been creasing? can we not have been creasing? can you not have been creasing? can they not have been creasing?