could ignite
Regular verb: ignite - ignited- ignited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could ignite
you could ignite
he could ignite
we could ignite
you could ignite
they could ignite 	I could be igniting
you could be igniting
he could be igniting
we could be igniting
you could be igniting
they could be igniting	I could have ignited
you could have ignited
he could have ignited
we could have ignited
you could have ignited
they could have ignited	I could have been igniting
you could have been igniting
he could have been igniting
we could have been igniting
you could have been igniting
they could have been igniting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not ignite
you could not ignite
he could not ignite
we could not ignite
you could not ignite
they could not ignite 	I could not be igniting
you could not be igniting
he could not be igniting
we could not be igniting
you could not be igniting
they could not be igniting	I could not have ignited
you could not have ignited
he could not have ignited
we could not have ignited
you could not have ignited
they could not have ignited	I could not have been igniting
you could not have been igniting
he could not have been igniting
we could not have been igniting
you could not have been igniting
they could not have been igniting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I ignite?
could you ignite?
could he ignite?
could we ignite?
could you ignite?
could they ignite? 	could I be igniting?
could you be igniting?
could he be igniting?
could we be igniting?
could you be igniting?
could they be igniting? 	could I have ignited?
could you have ignited?
could he have ignited?
could we have ignited?
could you have ignited?
could they have ignited? 	could I have been igniting?
could you have been igniting?
could he have been igniting?
could we have been igniting?
could you have been igniting?
could they have been igniting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not ignite?
could you not ignite?
could he not ignite?
could we not ignite?
could you not ignite?
could they not ignite? 	could I not be igniting?
could you not be igniting?
could he not be igniting?
could we not be igniting?
could you not be igniting?
could they not be igniting? 	could I not have ignited?
could you not have ignited?
could he not have ignited?
could we not have ignited?
could you not have ignited?
could they not have ignited? 	could I not have been igniting?
could you not have been igniting?
could he not have been igniting?
could we not have been igniting?
could you not have been igniting?
could they not have been igniting?