English verb conjugation
COULD IGNITE

Regular verb: ignite - ignited - ignited

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I couldn't ignite you couldn't ignite he couldn't ignite we couldn't ignite you couldn't ignite they couldn't ignite	I couldn't be igniting you couldn't be igniting he couldn't be igniting we couldn't be igniting you couldn't be igniting they couldn't be igniting
Perfect	V-ing perfect
I couldn't have ignited you couldn't have ignited he couldn't have ignited we couldn't have ignited you couldn't have ignited they couldn't have ignited	I couldn't have been igniting you couldn't have been igniting he couldn't have been igniting we couldn't have been igniting you couldn't have been igniting they couldn't have been igniting

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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
couldn't I ignite? couldn't you ignite? couldn't he ignite? couldn't we ignite? couldn't you ignite? couldn't they ignite?	couldn't I be igniting? couldn't you be igniting? couldn't he be igniting? couldn't we be igniting? couldn't you be igniting? couldn't they be igniting?
Perfect	V-ing perfect
couldn't I have ignited? couldn't you have ignited? couldn't he have ignited? couldn't we have ignited? couldn't you have ignited? couldn't they have ignited?	couldn't I have been igniting? couldn't you have been igniting? couldn't he have been igniting? couldn't we have been igniting? couldn't you have been igniting? couldn't they have been igniting?