must sprint
Regular verb: sprint - sprinted- sprinted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must sprint
you must sprint
he must sprint
we must sprint
you must sprint
they must sprint 	I must be sprinting
you must be sprinting
he must be sprinting
we must be sprinting
you must be sprinting
they must be sprinting	I must have sprinted
you must have sprinted
he must have sprinted
we must have sprinted
you must have sprinted
they must have sprinted	I must have been sprinting
you must have been sprinting
he must have been sprinting
we must have been sprinting
you must have been sprinting
they must have been sprinting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not sprint
you must not sprint
he must not sprint
we must not sprint
you must not sprint
they must not sprint 	I must not be sprinting
you must not be sprinting
he must not be sprinting
we must not be sprinting
you must not be sprinting
they must not be sprinting	I must not have sprinted
you must not have sprinted
he must not have sprinted
we must not have sprinted
you must not have sprinted
they must not have sprinted	I must not have been sprinting
you must not have been sprinting
he must not have been sprinting
we must not have been sprinting
you must not have been sprinting
they must not have been sprinting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I sprint?
must you sprint?
must he sprint?
must we sprint?
must you sprint?
must they sprint? 	must I be sprinting?
must you be sprinting?
must he be sprinting?
must we be sprinting?
must you be sprinting?
must they be sprinting? 	must I have sprinted?
must you have sprinted?
must he have sprinted?
must we have sprinted?
must you have sprinted?
must they have sprinted? 	must I have been sprinting?
must you have been sprinting?
must he have been sprinting?
must we have been sprinting?
must you have been sprinting?
must they have been sprinting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not sprint?
must you not sprint?
must he not sprint?
must we not sprint?
must you not sprint?
must they not sprint? 	must I not be sprinting?
must you not be sprinting?
must he not be sprinting?
must we not be sprinting?
must you not be sprinting?
must they not be sprinting? 	must I not have sprinted?
must you not have sprinted?
must he not have sprinted?
must we not have sprinted?
must you not have sprinted?
must they not have sprinted? 	must I not have been sprinting?
must you not have been sprinting?
must he not have been sprinting?
must we not have been sprinting?
must you not have been sprinting?
must they not have been sprinting?