English verb conjugation
COULD TAT

Regular verb: tat - tatted - tatted

Affirmation

Simple form	V-ing form
I could tat you could tat he could tat we could tat you could tat they could tat	I could be tatting you could be tatting he could be tatting we could be tatting you could be tatting they could be tatting
Perfect	V-ing perfect
I could have tatted you could have tatted he could have tatted we could have tatted you could have tatted they could have tatted	I could have been tatting you could have been tatting he could have been tatting we could have been tatting you could have been tatting they could have been tatting

Negation

Simple form	V-ing form
I could not tat you could not tat he could not tat we could not tat you could not tat they could not tat	I could not be tatting you could not be tatting he could not be tatting we could not be tatting you could not be tatting they could not be tatting
Perfect	V-ing perfect
I could not have tatted you could not have tatted he could not have tatted we could not have tatted you could not have tatted they could not have tatted	I could not have been tatting you could not have been tatting he could not have been tatting we could not have been tatting you could not have been tatting they could not have been tatting

Interrogative form

Simple form	V-ing form
could I tat? could you tat? could he tat? could we tat? could you tat? could they tat?	could I be tatting? could you be tatting? could he be tatting? could we be tatting? could you be tatting? could they be tatting?
Perfect	V-ing perfect
could I have tatted? could you have tatted? could he have tatted? could we have tatted? could you have tatted? could they have tatted?	could I have been tatting? could you have been tatting? could he have been tatting? could we have been tatting? could you have been tatting? could they have been tatting?

Interro-negative form

Simple form	V-ing form
could I not tat? could you not tat? could he not tat? could we not tat? could you not tat? could they not tat?	could I not be tatting? could you not be tatting? could he not be tatting? could we not be tatting? could you not be tatting? could they not be tatting?
Perfect	V-ing perfect
could I not have tatted? could you not have tatted? could he not have tatted? could we not have tatted? could you not have tatted? could they not have tatted?	could I not have been tatting? could you not have been tatting? could he not have been tatting? could we not have been tatting? could you not have been tatting? could they not have been tatting?