English verb conjugation
MUST STING

Irregular verb: sting - stung - stung

Affirmation

Simple form	V-ing form
I must sting you must sting he must sting we must sting you must sting they must sting	I must be stinging you must be stinging he must be stinging we must be stinging you must be stinging they must be stinging
Perfect	V-ing perfect
I must have stung you must have stung he must have stung we must have stung you must have stung they must have stung	I must have been stinging you must have been stinging he must have been stinging we must have been stinging you must have been stinging they must have been stinging

Negation

Simple form	V-ing form
I mustn't sting you mustn't sting he mustn't sting we mustn't sting you mustn't sting they mustn't sting	I mustn't be stinging you mustn't be stinging he mustn't be stinging we mustn't be stinging you mustn't be stinging they mustn't be stinging
Perfect	V-ing perfect
I mustn't have stung you mustn't have stung he mustn't have stung we mustn't have stung you mustn't have stung they mustn't have stung	I mustn't have been stinging you mustn't have been stinging he mustn't have been stinging we mustn't have been stinging you mustn't have been stinging they mustn't have been stinging

Interrogative form

Simple form	V-ing form
must I sting? must you sting? must he sting? must we sting? must you sting? must they sting?	must I be stinging? must you be stinging? must he be stinging? must we be stinging? must you be stinging? must they be stinging?
Perfect	V-ing perfect
must I have stung? must you have stung? must he have stung? must we have stung? must you have stung? must they have stung?	must I have been stinging? must you have been stinging? must he have been stinging? must we have been stinging? must you have been stinging? must they have been stinging?

Interro-negative form

Simple form	V-ing form
mustn't I sting? mustn't you sting? mustn't he sting? mustn't we sting? mustn't you sting? mustn't they sting?	mustn't I be stinging? mustn't you be stinging? mustn't he be stinging? mustn't we be stinging? mustn't you be stinging? mustn't they be stinging?
Perfect	V-ing perfect
mustn't I have stung? mustn't you have stung? mustn't he have stung? mustn't we have stung? mustn't you have stung? mustn't they have stung?	mustn't I have been stinging? mustn't you have been stinging? mustn't he have been stinging? mustn't we have been stinging? mustn't you have been stinging? mustn't they have been stinging?