must wis
Irregular verb: wis - wissed, wist- wissed, wist

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must wis
you must wis
he must wis
we must wis
you must wis
they must wis 	I must be wising
you must be wising
he must be wising
we must be wising
you must be wising
they must be wising	I must have wissed, wist
you must have wissed, wist
he must have wissed, wist
we must have wissed, wist
you must have wissed, wist
they must have wissed, wist	I must have been wising
you must have been wising
he must have been wising
we must have been wising
you must have been wising
they must have been wising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't wis
you mustn't wis
he mustn't wis
we mustn't wis
you mustn't wis
they mustn't wis 	I mustn't be wising
you mustn't be wising
he mustn't be wising
we mustn't be wising
you mustn't be wising
they mustn't be wising	I mustn't have wissed, wist
you mustn't have wissed, wist
he mustn't have wissed, wist
we mustn't have wissed, wist
you mustn't have wissed, wist
they mustn't have wissed, wist	I mustn't have been wising
you mustn't have been wising
he mustn't have been wising
we mustn't have been wising
you mustn't have been wising
they mustn't have been wising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I wis?
must you wis?
must he wis?
must we wis?
must you wis?
must they wis? 	must I be wising?
must you be wising?
must he be wising?
must we be wising?
must you be wising?
must they be wising? 	must I have wissed, wist?
must you have wissed, wist?
must he have wissed, wist?
must we have wissed, wist?
must you have wissed, wist?
must they have wissed, wist? 	must I have been wising?
must you have been wising?
must he have been wising?
must we have been wising?
must you have been wising?
must they have been wising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I wis?
mustn't you wis?
mustn't he wis?
mustn't we wis?
mustn't you wis?
mustn't they wis? 	mustn't I be wising?
mustn't you be wising?
mustn't he be wising?
mustn't we be wising?
mustn't you be wising?
mustn't they be wising? 	mustn't I have wissed, wist?
mustn't you have wissed, wist?
mustn't he have wissed, wist?
mustn't we have wissed, wist?
mustn't you have wissed, wist?
mustn't they have wissed, wist? 	mustn't I have been wising?
mustn't you have been wising?
mustn't he have been wising?
mustn't we have been wising?
mustn't you have been wising?
mustn't they have been wising?