could precancel
Regular verb: precancel - precanceled- precanceled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could precancel
you could precancel
he could precancel
we could precancel
you could precancel
they could precancel 	I could be precanceling
you could be precanceling
he could be precanceling
we could be precanceling
you could be precanceling
they could be precanceling	I could have precanceled
you could have precanceled
he could have precanceled
we could have precanceled
you could have precanceled
they could have precanceled	I could have been precanceling
you could have been precanceling
he could have been precanceling
we could have been precanceling
you could have been precanceling
they could have been precanceling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't precancel
you couldn't precancel
he couldn't precancel
we couldn't precancel
you couldn't precancel
they couldn't precancel 	I couldn't be precanceling
you couldn't be precanceling
he couldn't be precanceling
we couldn't be precanceling
you couldn't be precanceling
they couldn't be precanceling	I couldn't have precanceled
you couldn't have precanceled
he couldn't have precanceled
we couldn't have precanceled
you couldn't have precanceled
they couldn't have precanceled	I couldn't have been precanceling
you couldn't have been precanceling
he couldn't have been precanceling
we couldn't have been precanceling
you couldn't have been precanceling
they couldn't have been precanceling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I precancel?
could you precancel?
could he precancel?
could we precancel?
could you precancel?
could they precancel? 	could I be precanceling?
could you be precanceling?
could he be precanceling?
could we be precanceling?
could you be precanceling?
could they be precanceling? 	could I have precanceled?
could you have precanceled?
could he have precanceled?
could we have precanceled?
could you have precanceled?
could they have precanceled? 	could I have been precanceling?
could you have been precanceling?
could he have been precanceling?
could we have been precanceling?
could you have been precanceling?
could they have been precanceling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I precancel?
couldn't you precancel?
couldn't he precancel?
couldn't we precancel?
couldn't you precancel?
couldn't they precancel? 	couldn't I be precanceling?
couldn't you be precanceling?
couldn't he be precanceling?
couldn't we be precanceling?
couldn't you be precanceling?
couldn't they be precanceling? 	couldn't I have precanceled?
couldn't you have precanceled?
couldn't he have precanceled?
couldn't we have precanceled?
couldn't you have precanceled?
couldn't they have precanceled? 	couldn't I have been precanceling?
couldn't you have been precanceling?
couldn't he have been precanceling?
couldn't we have been precanceling?
couldn't you have been precanceling?
couldn't they have been precanceling?