I can degrease you can degrease he can degrease we can degrease you can degrease they can degrease
V-ing form
I can be degreasing you can be degreasing he can be degreasing we can be degreasing you can be degreasing they can be degreasing
Perfect
I can have degreased you can have degreased he can have degreased we can have degreased you can have degreased they can have degreased
V-ing perfect
I can have been degreasing you can have been degreasing he can have been degreasing we can have been degreasing you can have been degreasing they can have been degreasing
Negation
Simple form
I cannot degrease you cannot degrease he cannot degrease we cannot degrease you cannot degrease they cannot degrease
V-ing form
I cannot be degreasing you cannot be degreasing he cannot be degreasing we cannot be degreasing you cannot be degreasing they cannot be degreasing
Perfect
I cannot have degreased you cannot have degreased he cannot have degreased we cannot have degreased you cannot have degreased they cannot have degreased
V-ing perfect
I cannot have been degreasing you cannot have been degreasing he cannot have been degreasing we cannot have been degreasing you cannot have been degreasing they cannot have been degreasing
Interrogative form
Simple form
can I degrease? can you degrease? can he degrease? can we degrease? can you degrease? can they degrease?
V-ing form
can I be degreasing? can you be degreasing? can he be degreasing? can we be degreasing? can you be degreasing? can they be degreasing?
Perfect
can I have degreased? can you have degreased? can he have degreased? can we have degreased? can you have degreased? can they have degreased?
V-ing perfect
can I have been degreasing? can you have been degreasing? can he have been degreasing? can we have been degreasing? can you have been degreasing? can they have been degreasing?
Interro-negative form
Simple form
can I not degrease? can you not degrease? can he not degrease? can we not degrease? can you not degrease? can they not degrease?
V-ing form
can I not be degreasing? can you not be degreasing? can he not be degreasing? can we not be degreasing? can you not be degreasing? can they not be degreasing?
Perfect
can I not have degreased? can you not have degreased? can he not have degreased? can we not have degreased? can you not have degreased? can they not have degreased?
V-ing perfect
can I not have been degreasing? can you not have been degreasing? can he not have been degreasing? can we not have been degreasing? can you not have been degreasing? can they not have been degreasing?