could quill
Regular verb: quill - quilled- quilled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could quill
you could quill
she could quill
we could quill
you could quill
they could quill 	I could be quilling
you could be quilling
she could be quilling
we could be quilling
you could be quilling
they could be quilling	I could have quilled
you could have quilled
she could have quilled
we could have quilled
you could have quilled
they could have quilled	I could have been quilling
you could have been quilling
she could have been quilling
we could have been quilling
you could have been quilling
they could have been quilling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not quill
you could not quill
she could not quill
we could not quill
you could not quill
they could not quill 	I could not be quilling
you could not be quilling
she could not be quilling
we could not be quilling
you could not be quilling
they could not be quilling	I could not have quilled
you could not have quilled
she could not have quilled
we could not have quilled
you could not have quilled
they could not have quilled	I could not have been quilling
you could not have been quilling
she could not have been quilling
we could not have been quilling
you could not have been quilling
they could not have been quilling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I quill?
could you quill?
could she quill?
could we quill?
could you quill?
could they quill? 	could I be quilling?
could you be quilling?
could she be quilling?
could we be quilling?
could you be quilling?
could they be quilling? 	could I have quilled?
could you have quilled?
could she have quilled?
could we have quilled?
could you have quilled?
could they have quilled? 	could I have been quilling?
could you have been quilling?
could she have been quilling?
could we have been quilling?
could you have been quilling?
could they have been quilling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not quill?
could you not quill?
could she not quill?
could we not quill?
could you not quill?
could they not quill? 	could I not be quilling?
could you not be quilling?
could she not be quilling?
could we not be quilling?
could you not be quilling?
could they not be quilling? 	could I not have quilled?
could you not have quilled?
could she not have quilled?
could we not have quilled?
could you not have quilled?
could they not have quilled? 	could I not have been quilling?
could you not have been quilling?
could she not have been quilling?
could we not have been quilling?
could you not have been quilling?
could they not have been quilling?