English verb conjugation
COULD PAT

Regular verb: pat - patted - patted

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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