English verb conjugation
MUST SPOIL

Irregular verb: spoil - spoiled, spoilt - spoiled, spoilt

Affirmation

Simple form	V-ing form
I must spoil you must spoil he must spoil we must spoil you must spoil they must spoil	I must be spoiling you must be spoiling he must be spoiling we must be spoiling you must be spoiling they must be spoiling
Perfect	V-ing perfect
I must have spoiled, spoilt you must have spoiled, spoilt he must have spoiled, spoilt we must have spoiled, spoilt you must have spoiled, spoilt they must have spoiled, spoilt	I must have been spoiling you must have been spoiling he must have been spoiling we must have been spoiling you must have been spoiling they must have been spoiling

Negation

Simple form	V-ing form
I mustn't spoil you mustn't spoil he mustn't spoil we mustn't spoil you mustn't spoil they mustn't spoil	I mustn't be spoiling you mustn't be spoiling he mustn't be spoiling we mustn't be spoiling you mustn't be spoiling they mustn't be spoiling
Perfect	V-ing perfect
I mustn't have spoiled, spoilt you mustn't have spoiled, spoilt he mustn't have spoiled, spoilt we mustn't have spoiled, spoilt you mustn't have spoiled, spoilt they mustn't have spoiled, spoilt	I mustn't have been spoiling you mustn't have been spoiling he mustn't have been spoiling we mustn't have been spoiling you mustn't have been spoiling they mustn't have been spoiling

Interrogative form

Simple form	V-ing form
must I spoil? must you spoil? must he spoil? must we spoil? must you spoil? must they spoil?	must I be spoiling? must you be spoiling? must he be spoiling? must we be spoiling? must you be spoiling? must they be spoiling?
Perfect	V-ing perfect
must I have spoiled, spoilt? must you have spoiled, spoilt? must he have spoiled, spoilt? must we have spoiled, spoilt? must you have spoiled, spoilt? must they have spoiled, spoilt?	must I have been spoiling? must you have been spoiling? must he have been spoiling? must we have been spoiling? must you have been spoiling? must they have been spoiling?

Interro-negative form

Simple form	V-ing form
mustn't I spoil? mustn't you spoil? mustn't he spoil? mustn't we spoil? mustn't you spoil? mustn't they spoil?	mustn't I be spoiling? mustn't you be spoiling? mustn't he be spoiling? mustn't we be spoiling? mustn't you be spoiling? mustn't they be spoiling?
Perfect	V-ing perfect
mustn't I have spoiled, spoilt? mustn't you have spoiled, spoilt? mustn't he have spoiled, spoilt? mustn't we have spoiled, spoilt? mustn't you have spoiled, spoilt? mustn't they have spoiled, spoilt?	mustn't I have been spoiling? mustn't you have been spoiling? mustn't he have been spoiling? mustn't we have been spoiling? mustn't you have been spoiling? mustn't they have been spoiling?