could tatter
Regular verb: tatter - tattered- tattered

Affirmation 	
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I could tatter
you could tatter
she could tatter
we could tatter
you could tatter
they could tatter 	I could be tattering
you could be tattering
she could be tattering
we could be tattering
you could be tattering
they could be tattering	I could have tattered
you could have tattered
she could have tattered
we could have tattered
you could have tattered
they could have tattered	I could have been tattering
you could have been tattering
she could have been tattering
we could have been tattering
you could have been tattering
they could have been tattering	

Negation 	
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I could not tatter
you could not tatter
she could not tatter
we could not tatter
you could not tatter
they could not tatter 	I could not be tattering
you could not be tattering
she could not be tattering
we could not be tattering
you could not be tattering
they could not be tattering	I could not have tattered
you could not have tattered
she could not have tattered
we could not have tattered
you could not have tattered
they could not have tattered	I could not have been tattering
you could not have been tattering
she could not have been tattering
we could not have been tattering
you could not have been tattering
they could not have been tattering	

Interrogative form 	
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could I tatter?
could you tatter?
could she tatter?
could we tatter?
could you tatter?
could they tatter? 	could I be tattering?
could you be tattering?
could she be tattering?
could we be tattering?
could you be tattering?
could they be tattering? 	could I have tattered?
could you have tattered?
could she have tattered?
could we have tattered?
could you have tattered?
could they have tattered? 	could I have been tattering?
could you have been tattering?
could she have been tattering?
could we have been tattering?
could you have been tattering?
could they have been tattering? 	

Interro-negative form 	
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could I not tatter?
could you not tatter?
could she not tatter?
could we not tatter?
could you not tatter?
could they not tatter? 	could I not be tattering?
could you not be tattering?
could she not be tattering?
could we not be tattering?
could you not be tattering?
could they not be tattering? 	could I not have tattered?
could you not have tattered?
could she not have tattered?
could we not have tattered?
could you not have tattered?
could they not have tattered? 	could I not have been tattering?
could you not have been tattering?
could she not have been tattering?
could we not have been tattering?
could you not have been tattering?
could they not have been tattering?