English verb conjugation
MUST LEISTER

Regular verb: leister - leistered - leistered

Affirmation

Simple form	V-ing form
I must leister you must leister she must leister we must leister you must leister they must leister	I must be leistering you must be leistering she must be leistering we must be leistering you must be leistering they must be leistering
Perfect	V-ing perfect
I must have leistered you must have leistered she must have leistered we must have leistered you must have leistered they must have leistered	I must have been leistering you must have been leistering she must have been leistering we must have been leistering you must have been leistering they must have been leistering

Negation

Simple form	V-ing form
I mustn't leister you mustn't leister she mustn't leister we mustn't leister you mustn't leister they mustn't leister	I mustn't be leistering you mustn't be leistering she mustn't be leistering we mustn't be leistering you mustn't be leistering they mustn't be leistering
Perfect	V-ing perfect
I mustn't have leistered you mustn't have leistered she mustn't have leistered we mustn't have leistered you mustn't have leistered they mustn't have leistered	I mustn't have been leistering you mustn't have been leistering she mustn't have been leistering we mustn't have been leistering you mustn't have been leistering they mustn't have been leistering

Interrogative form

Simple form	V-ing form
must I leister? must you leister? must she leister? must we leister? must you leister? must they leister?	must I be leistering? must you be leistering? must she be leistering? must we be leistering? must you be leistering? must they be leistering?
Perfect	V-ing perfect
must I have leistered? must you have leistered? must she have leistered? must we have leistered? must you have leistered? must they have leistered?	must I have been leistering? must you have been leistering? must she have been leistering? must we have been leistering? must you have been leistering? must they have been leistering?

Interro-negative form

Simple form	V-ing form
mustn't I leister? mustn't you leister? mustn't she leister? mustn't we leister? mustn't you leister? mustn't they leister?	mustn't I be leistering? mustn't you be leistering? mustn't she be leistering? mustn't we be leistering? mustn't you be leistering? mustn't they be leistering?
Perfect	V-ing perfect
mustn't I have leistered? mustn't you have leistered? mustn't she have leistered? mustn't we have leistered? mustn't you have leistered? mustn't they have leistered?	mustn't I have been leistering? mustn't you have been leistering? mustn't she have been leistering? mustn't we have been leistering? mustn't you have been leistering? mustn't they have been leistering?