English verb conjugation
CAN PAT

Regular verb: pat - patted - patted

Affirmation

Simple form	V-ing form
I can pat you can pat he can pat we can pat you can pat they can pat	I can be patting you can be patting he can be patting we can be patting you can be patting they can be patting
Perfect	V-ing perfect
I can have patted you can have patted he can have patted we can have patted you can have patted they can have patted	I can have been patting you can have been patting he can have been patting we can have been patting you can have been patting they can have been patting

Negation

Simple form	V-ing form
I cannot pat you cannot pat he cannot pat we cannot pat you cannot pat they cannot pat	I cannot be patting you cannot be patting he cannot be patting we cannot be patting you cannot be patting they cannot be patting
Perfect	V-ing perfect
I cannot have patted you cannot have patted he cannot have patted we cannot have patted you cannot have patted they cannot have patted	I cannot have been patting you cannot have been patting he cannot have been patting we cannot have been patting you cannot have been patting they cannot have been patting

Interrogative form

Simple form	V-ing form
can I pat? can you pat? can he pat? can we pat? can you pat? can they pat?	can I be patting? can you be patting? can he be patting? can we be patting? can you be patting? can they be patting?
Perfect	V-ing perfect
can I have patted? can you have patted? can he have patted? can we have patted? can you have patted? can they have patted?	can I have been patting? can you have been patting? can he have been patting? can we have been patting? can you have been patting? can they have been patting?

Interro-negative form

Simple form	V-ing form
can I not pat? can you not pat? can he not pat? can we not pat? can you not pat? can they not pat?	can I not be patting? can you not be patting? can he not be patting? can we not be patting? can you not be patting? can they not be patting?
Perfect	V-ing perfect
can I not have patted? can you not have patted? can he not have patted? can we not have patted? can you not have patted? can they not have patted?	can I not have been patting? can you not have been patting? can he not have been patting? can we not have been patting? can you not have been patting? can they not have been patting?