must burl
Regular verb: burl - burled- burled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must burl
you must burl
he must burl
we must burl
you must burl
they must burl 	I must be burling
you must be burling
he must be burling
we must be burling
you must be burling
they must be burling	I must have burled
you must have burled
he must have burled
we must have burled
you must have burled
they must have burled	I must have been burling
you must have been burling
he must have been burling
we must have been burling
you must have been burling
they must have been burling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not burl
you must not burl
he must not burl
we must not burl
you must not burl
they must not burl 	I must not be burling
you must not be burling
he must not be burling
we must not be burling
you must not be burling
they must not be burling	I must not have burled
you must not have burled
he must not have burled
we must not have burled
you must not have burled
they must not have burled	I must not have been burling
you must not have been burling
he must not have been burling
we must not have been burling
you must not have been burling
they must not have been burling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I burl?
must you burl?
must he burl?
must we burl?
must you burl?
must they burl? 	must I be burling?
must you be burling?
must he be burling?
must we be burling?
must you be burling?
must they be burling? 	must I have burled?
must you have burled?
must he have burled?
must we have burled?
must you have burled?
must they have burled? 	must I have been burling?
must you have been burling?
must he have been burling?
must we have been burling?
must you have been burling?
must they have been burling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not burl?
must you not burl?
must he not burl?
must we not burl?
must you not burl?
must they not burl? 	must I not be burling?
must you not be burling?
must he not be burling?
must we not be burling?
must you not be burling?
must they not be burling? 	must I not have burled?
must you not have burled?
must he not have burled?
must we not have burled?
must you not have burled?
must they not have burled? 	must I not have been burling?
must you not have been burling?
must he not have been burling?
must we not have been burling?
must you not have been burling?
must they not have been burling?