could quill
Regular verb: quill - quilled- quilled

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