English verb conjugation
CAN GREASE

Regular verb: grease - greased - greased

Affirmation

Simple form	V-ing form
I can grease you can grease he can grease we can grease you can grease they can grease	I can be greasing you can be greasing he can be greasing we can be greasing you can be greasing they can be greasing
Perfect	V-ing perfect
I can have greased you can have greased he can have greased we can have greased you can have greased they can have greased	I can have been greasing you can have been greasing he can have been greasing we can have been greasing you can have been greasing they can have been greasing

Negation

Simple form	V-ing form
I can't grease you can't grease he can't grease we can't grease you can't grease they can't grease	I can't be greasing you can't be greasing he can't be greasing we can't be greasing you can't be greasing they can't be greasing
Perfect	V-ing perfect
I can't have greased you can't have greased he can't have greased we can't have greased you can't have greased they can't have greased	I can't have been greasing you can't have been greasing he can't have been greasing we can't have been greasing you can't have been greasing they can't have been greasing

Interrogative form

Simple form	V-ing form
can I grease? can you grease? can he grease? can we grease? can you grease? can they grease?	can I be greasing? can you be greasing? can he be greasing? can we be greasing? can you be greasing? can they be greasing?
Perfect	V-ing perfect
can I have greased? can you have greased? can he have greased? can we have greased? can you have greased? can they have greased?	can I have been greasing? can you have been greasing? can he have been greasing? can we have been greasing? can you have been greasing? can they have been greasing?

Interro-negative form

Simple form	V-ing form
can't I grease? can't you grease? can't he grease? can't we grease? can't you grease? can't they grease?	can't I be greasing? can't you be greasing? can't he be greasing? can't we be greasing? can't you be greasing? can't they be greasing?
Perfect	V-ing perfect
can't I have greased? can't you have greased? can't he have greased? can't we have greased? can't you have greased? can't they have greased?	can't I have been greasing? can't you have been greasing? can't he have been greasing? can't we have been greasing? can't you have been greasing? can't they have been greasing?