could shirttail
Regular verb: shirttail - shirttailed- shirttailed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could shirttail
you could shirttail
he could shirttail
we could shirttail
you could shirttail
they could shirttail 	I could be shirttailing
you could be shirttailing
he could be shirttailing
we could be shirttailing
you could be shirttailing
they could be shirttailing	I could have shirttailed
you could have shirttailed
he could have shirttailed
we could have shirttailed
you could have shirttailed
they could have shirttailed	I could have been shirttailing
you could have been shirttailing
he could have been shirttailing
we could have been shirttailing
you could have been shirttailing
they could have been shirttailing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not shirttail
you could not shirttail
he could not shirttail
we could not shirttail
you could not shirttail
they could not shirttail 	I could not be shirttailing
you could not be shirttailing
he could not be shirttailing
we could not be shirttailing
you could not be shirttailing
they could not be shirttailing	I could not have shirttailed
you could not have shirttailed
he could not have shirttailed
we could not have shirttailed
you could not have shirttailed
they could not have shirttailed	I could not have been shirttailing
you could not have been shirttailing
he could not have been shirttailing
we could not have been shirttailing
you could not have been shirttailing
they could not have been shirttailing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I shirttail?
could you shirttail?
could he shirttail?
could we shirttail?
could you shirttail?
could they shirttail? 	could I be shirttailing?
could you be shirttailing?
could he be shirttailing?
could we be shirttailing?
could you be shirttailing?
could they be shirttailing? 	could I have shirttailed?
could you have shirttailed?
could he have shirttailed?
could we have shirttailed?
could you have shirttailed?
could they have shirttailed? 	could I have been shirttailing?
could you have been shirttailing?
could he have been shirttailing?
could we have been shirttailing?
could you have been shirttailing?
could they have been shirttailing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not shirttail?
could you not shirttail?
could he not shirttail?
could we not shirttail?
could you not shirttail?
could they not shirttail? 	could I not be shirttailing?
could you not be shirttailing?
could he not be shirttailing?
could we not be shirttailing?
could you not be shirttailing?
could they not be shirttailing? 	could I not have shirttailed?
could you not have shirttailed?
could he not have shirttailed?
could we not have shirttailed?
could you not have shirttailed?
could they not have shirttailed? 	could I not have been shirttailing?
could you not have been shirttailing?
could he not have been shirttailing?
could we not have been shirttailing?
could you not have been shirttailing?
could they not have been shirttailing?