English verb conjugation
MUST IGNITE

Regular verb: ignite - ignited - ignited

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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