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 couldn't tat you couldn't tat he couldn't tat we couldn't tat you couldn't tat they couldn't tat	I couldn't be tatting you couldn't be tatting he couldn't be tatting we couldn't be tatting you couldn't be tatting they couldn't be tatting
Perfect	V-ing perfect
I couldn't have tatted you couldn't have tatted he couldn't have tatted we couldn't have tatted you couldn't have tatted they couldn't have tatted	I couldn't have been tatting you couldn't have been tatting he couldn't have been tatting we couldn't have been tatting you couldn't have been tatting they couldn't 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
couldn't I tat? couldn't you tat? couldn't he tat? couldn't we tat? couldn't you tat? couldn't they tat?	couldn't I be tatting? couldn't you be tatting? couldn't he be tatting? couldn't we be tatting? couldn't you be tatting? couldn't they be tatting?
Perfect	V-ing perfect
couldn't I have tatted? couldn't you have tatted? couldn't he have tatted? couldn't we have tatted? couldn't you have tatted? couldn't they have tatted?	couldn't I have been tatting? couldn't you have been tatting? couldn't he have been tatting? couldn't we have been tatting? couldn't you have been tatting? couldn't they have been tatting?