must tan
Regular verb: tan - tanned- tanned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must tan
you must tan
she must tan
we must tan
you must tan
they must tan 	I must be tanning
you must be tanning
she must be tanning
we must be tanning
you must be tanning
they must be tanning	I must have tanned
you must have tanned
she must have tanned
we must have tanned
you must have tanned
they must have tanned	I must have been tanning
you must have been tanning
she must have been tanning
we must have been tanning
you must have been tanning
they must have been tanning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't tan
you mustn't tan
she mustn't tan
we mustn't tan
you mustn't tan
they mustn't tan 	I mustn't be tanning
you mustn't be tanning
she mustn't be tanning
we mustn't be tanning
you mustn't be tanning
they mustn't be tanning	I mustn't have tanned
you mustn't have tanned
she mustn't have tanned
we mustn't have tanned
you mustn't have tanned
they mustn't have tanned	I mustn't have been tanning
you mustn't have been tanning
she mustn't have been tanning
we mustn't have been tanning
you mustn't have been tanning
they mustn't have been tanning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I tan?
must you tan?
must she tan?
must we tan?
must you tan?
must they tan? 	must I be tanning?
must you be tanning?
must she be tanning?
must we be tanning?
must you be tanning?
must they be tanning? 	must I have tanned?
must you have tanned?
must she have tanned?
must we have tanned?
must you have tanned?
must they have tanned? 	must I have been tanning?
must you have been tanning?
must she have been tanning?
must we have been tanning?
must you have been tanning?
must they have been tanning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I tan?
mustn't you tan?
mustn't she tan?
mustn't we tan?
mustn't you tan?
mustn't they tan? 	mustn't I be tanning?
mustn't you be tanning?
mustn't she be tanning?
mustn't we be tanning?
mustn't you be tanning?
mustn't they be tanning? 	mustn't I have tanned?
mustn't you have tanned?
mustn't she have tanned?
mustn't we have tanned?
mustn't you have tanned?
mustn't they have tanned? 	mustn't I have been tanning?
mustn't you have been tanning?
mustn't she have been tanning?
mustn't we have been tanning?
mustn't you have been tanning?
mustn't they have been tanning?