English verb conjugation
MUST SPAN

Regular verb: span - spanned - spanned

Affirmation

Simple form	V-ing form
I must span you must span he must span we must span you must span they must span	I must be spanning you must be spanning he must be spanning we must be spanning you must be spanning they must be spanning
Perfect	V-ing perfect
I must have spanned you must have spanned he must have spanned we must have spanned you must have spanned they must have spanned	I must have been spanning you must have been spanning he must have been spanning we must have been spanning you must have been spanning they must have been spanning

Negation

Simple form	V-ing form
I mustn't span you mustn't span he mustn't span we mustn't span you mustn't span they mustn't span	I mustn't be spanning you mustn't be spanning he mustn't be spanning we mustn't be spanning you mustn't be spanning they mustn't be spanning
Perfect	V-ing perfect
I mustn't have spanned you mustn't have spanned he mustn't have spanned we mustn't have spanned you mustn't have spanned they mustn't have spanned	I mustn't have been spanning you mustn't have been spanning he mustn't have been spanning we mustn't have been spanning you mustn't have been spanning they mustn't have been spanning

Interrogative form

Simple form	V-ing form
must I span? must you span? must he span? must we span? must you span? must they span?	must I be spanning? must you be spanning? must he be spanning? must we be spanning? must you be spanning? must they be spanning?
Perfect	V-ing perfect
must I have spanned? must you have spanned? must he have spanned? must we have spanned? must you have spanned? must they have spanned?	must I have been spanning? must you have been spanning? must he have been spanning? must we have been spanning? must you have been spanning? must they have been spanning?

Interro-negative form

Simple form	V-ing form
mustn't I span? mustn't you span? mustn't he span? mustn't we span? mustn't you span? mustn't they span?	mustn't I be spanning? mustn't you be spanning? mustn't he be spanning? mustn't we be spanning? mustn't you be spanning? mustn't they be spanning?
Perfect	V-ing perfect
mustn't I have spanned? mustn't you have spanned? mustn't he have spanned? mustn't we have spanned? mustn't you have spanned? mustn't they have spanned?	mustn't I have been spanning? mustn't you have been spanning? mustn't he have been spanning? mustn't we have been spanning? mustn't you have been spanning? mustn't they have been spanning?