must sling
Irregular verb: sling - slung- slung

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must sling
you must sling
he must sling
we must sling
you must sling
they must sling 	I must be slinging
you must be slinging
he must be slinging
we must be slinging
you must be slinging
they must be slinging	I must have slung
you must have slung
he must have slung
we must have slung
you must have slung
they must have slung	I must have been slinging
you must have been slinging
he must have been slinging
we must have been slinging
you must have been slinging
they must have been slinging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not sling
you must not sling
he must not sling
we must not sling
you must not sling
they must not sling 	I must not be slinging
you must not be slinging
he must not be slinging
we must not be slinging
you must not be slinging
they must not be slinging	I must not have slung
you must not have slung
he must not have slung
we must not have slung
you must not have slung
they must not have slung	I must not have been slinging
you must not have been slinging
he must not have been slinging
we must not have been slinging
you must not have been slinging
they must not have been slinging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I sling?
must you sling?
must he sling?
must we sling?
must you sling?
must they sling? 	must I be slinging?
must you be slinging?
must he be slinging?
must we be slinging?
must you be slinging?
must they be slinging? 	must I have slung?
must you have slung?
must he have slung?
must we have slung?
must you have slung?
must they have slung? 	must I have been slinging?
must you have been slinging?
must he have been slinging?
must we have been slinging?
must you have been slinging?
must they have been slinging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not sling?
must you not sling?
must he not sling?
must we not sling?
must you not sling?
must they not sling? 	must I not be slinging?
must you not be slinging?
must he not be slinging?
must we not be slinging?
must you not be slinging?
must they not be slinging? 	must I not have slung?
must you not have slung?
must he not have slung?
must we not have slung?
must you not have slung?
must they not have slung? 	must I not have been slinging?
must you not have been slinging?
must he not have been slinging?
must we not have been slinging?
must you not have been slinging?
must they not have been slinging?