must sting
Irregular verb: sting - stung- stung

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I must not sting
you must not sting
he must not sting
we must not sting
you must not sting
they must not sting 	I must not be stinging
you must not be stinging
he must not be stinging
we must not be stinging
you must not be stinging
they must not be stinging	I must not have stung
you must not have stung
he must not have stung
we must not have stung
you must not have stung
they must not have stung	I must not have been stinging
you must not have been stinging
he must not have been stinging
we must not have been stinging
you must not have been stinging
they must not have been stinging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
must I not sting?
must you not sting?
must he not sting?
must we not sting?
must you not sting?
must they not sting? 	must I not be stinging?
must you not be stinging?
must he not be stinging?
must we not be stinging?
must you not be stinging?
must they not be stinging? 	must I not have stung?
must you not have stung?
must he not have stung?
must we not have stung?
must you not have stung?
must they not have stung? 	must I not have been stinging?
must you not have been stinging?
must he not have been stinging?
must we not have been stinging?
must you not have been stinging?
must they not have been stinging?