English verb conjugation
MUST LIGHT

Irregular verb: light - lit - lit

Affirmation

Simple form	V-ing form
I must light you must light she must light we must light you must light they must light	I must be lighting you must be lighting she must be lighting we must be lighting you must be lighting they must be lighting
Perfect	V-ing perfect
I must have lit you must have lit she must have lit we must have lit you must have lit they must have lit	I must have been lighting you must have been lighting she must have been lighting we must have been lighting you must have been lighting they must have been lighting

Negation

Simple form	V-ing form
I must not light you must not light she must not light we must not light you must not light they must not light	I must not be lighting you must not be lighting she must not be lighting we must not be lighting you must not be lighting they must not be lighting
Perfect	V-ing perfect
I must not have lit you must not have lit she must not have lit we must not have lit you must not have lit they must not have lit	I must not have been lighting you must not have been lighting she must not have been lighting we must not have been lighting you must not have been lighting they must not have been lighting

Interrogative form

Simple form	V-ing form
must I light? must you light? must she light? must we light? must you light? must they light?	must I be lighting? must you be lighting? must she be lighting? must we be lighting? must you be lighting? must they be lighting?
Perfect	V-ing perfect
must I have lit? must you have lit? must she have lit? must we have lit? must you have lit? must they have lit?	must I have been lighting? must you have been lighting? must she have been lighting? must we have been lighting? must you have been lighting? must they have been lighting?

Interro-negative form

Simple form	V-ing form
must I not light? must you not light? must she not light? must we not light? must you not light? must they not light?	must I not be lighting? must you not be lighting? must she not be lighting? must we not be lighting? must you not be lighting? must they not be lighting?
Perfect	V-ing perfect
must I not have lit? must you not have lit? must she not have lit? must we not have lit? must you not have lit? must they not have lit?	must I not have been lighting? must you not have been lighting? must she not have been lighting? must we not have been lighting? must you not have been lighting? must they not have been lighting?