English verb conjugation
CAN SHEAF

Regular verb: sheaf - sheafed - sheafed

Affirmation

Simple form	V-ing form
I can sheaf you can sheaf he can sheaf we can sheaf you can sheaf they can sheaf	I can be sheafing you can be sheafing he can be sheafing we can be sheafing you can be sheafing they can be sheafing
Perfect	V-ing perfect
I can have sheafed you can have sheafed he can have sheafed we can have sheafed you can have sheafed they can have sheafed	I can have been sheafing you can have been sheafing he can have been sheafing we can have been sheafing you can have been sheafing they can have been sheafing

Negation

Simple form	V-ing form
I cannot sheaf you cannot sheaf he cannot sheaf we cannot sheaf you cannot sheaf they cannot sheaf	I cannot be sheafing you cannot be sheafing he cannot be sheafing we cannot be sheafing you cannot be sheafing they cannot be sheafing
Perfect	V-ing perfect
I cannot have sheafed you cannot have sheafed he cannot have sheafed we cannot have sheafed you cannot have sheafed they cannot have sheafed	I cannot have been sheafing you cannot have been sheafing he cannot have been sheafing we cannot have been sheafing you cannot have been sheafing they cannot have been sheafing

Interrogative form

Simple form	V-ing form
can I sheaf? can you sheaf? can he sheaf? can we sheaf? can you sheaf? can they sheaf?	can I be sheafing? can you be sheafing? can he be sheafing? can we be sheafing? can you be sheafing? can they be sheafing?
Perfect	V-ing perfect
can I have sheafed? can you have sheafed? can he have sheafed? can we have sheafed? can you have sheafed? can they have sheafed?	can I have been sheafing? can you have been sheafing? can he have been sheafing? can we have been sheafing? can you have been sheafing? can they have been sheafing?

Interro-negative form

Simple form	V-ing form
can I not sheaf? can you not sheaf? can he not sheaf? can we not sheaf? can you not sheaf? can they not sheaf?	can I not be sheafing? can you not be sheafing? can he not be sheafing? can we not be sheafing? can you not be sheafing? can they not be sheafing?
Perfect	V-ing perfect
can I not have sheafed? can you not have sheafed? can he not have sheafed? can we not have sheafed? can you not have sheafed? can they not have sheafed?	can I not have been sheafing? can you not have been sheafing? can he not have been sheafing? can we not have been sheafing? can you not have been sheafing? can they not have been sheafing?