must stopple
Regular verb: stopple - stoppled- stoppled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must stopple
you must stopple
he must stopple
we must stopple
you must stopple
they must stopple 	I must be stoppling
you must be stoppling
he must be stoppling
we must be stoppling
you must be stoppling
they must be stoppling	I must have stoppled
you must have stoppled
he must have stoppled
we must have stoppled
you must have stoppled
they must have stoppled	I must have been stoppling
you must have been stoppling
he must have been stoppling
we must have been stoppling
you must have been stoppling
they must have been stoppling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not stopple
you must not stopple
he must not stopple
we must not stopple
you must not stopple
they must not stopple 	I must not be stoppling
you must not be stoppling
he must not be stoppling
we must not be stoppling
you must not be stoppling
they must not be stoppling	I must not have stoppled
you must not have stoppled
he must not have stoppled
we must not have stoppled
you must not have stoppled
they must not have stoppled	I must not have been stoppling
you must not have been stoppling
he must not have been stoppling
we must not have been stoppling
you must not have been stoppling
they must not have been stoppling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I stopple?
must you stopple?
must he stopple?
must we stopple?
must you stopple?
must they stopple? 	must I be stoppling?
must you be stoppling?
must he be stoppling?
must we be stoppling?
must you be stoppling?
must they be stoppling? 	must I have stoppled?
must you have stoppled?
must he have stoppled?
must we have stoppled?
must you have stoppled?
must they have stoppled? 	must I have been stoppling?
must you have been stoppling?
must he have been stoppling?
must we have been stoppling?
must you have been stoppling?
must they have been stoppling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not stopple?
must you not stopple?
must he not stopple?
must we not stopple?
must you not stopple?
must they not stopple? 	must I not be stoppling?
must you not be stoppling?
must he not be stoppling?
must we not be stoppling?
must you not be stoppling?
must they not be stoppling? 	must I not have stoppled?
must you not have stoppled?
must he not have stoppled?
must we not have stoppled?
must you not have stoppled?
must they not have stoppled? 	must I not have been stoppling?
must you not have been stoppling?
must he not have been stoppling?
must we not have been stoppling?
must you not have been stoppling?
must they not have been stoppling?