I can grease you can grease he can grease we can grease you can grease they can grease
V-ing form
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
I can have greased you can have greased he can have greased we can have greased you can have greased they can have greased
V-ing perfect
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
I can't grease you can't grease he can't grease we can't grease you can't grease they can't grease
V-ing form
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
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
V-ing perfect
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
can I grease? can you grease? can he grease? can we grease? can you grease? can they grease?
V-ing form
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
can I have greased? can you have greased? can he have greased? can we have greased? can you have greased? can they have greased?
V-ing perfect
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
can't I grease? can't you grease? can't he grease? can't we grease? can't you grease? can't they grease?
V-ing form
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
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?
V-ing perfect
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?