English verb conjugation
MUST PREINSERT

Regular verb: preinsert - preinserted - preinserted

Affirmation

Simple form	V-ing form
I must preinsert you must preinsert she must preinsert we must preinsert you must preinsert they must preinsert	I must be preinserting you must be preinserting she must be preinserting we must be preinserting you must be preinserting they must be preinserting
Perfect	V-ing perfect
I must have preinserted you must have preinserted she must have preinserted we must have preinserted you must have preinserted they must have preinserted	I must have been preinserting you must have been preinserting she must have been preinserting we must have been preinserting you must have been preinserting they must have been preinserting

Negation

Simple form	V-ing form
I mustn't preinsert you mustn't preinsert she mustn't preinsert we mustn't preinsert you mustn't preinsert they mustn't preinsert	I mustn't be preinserting you mustn't be preinserting she mustn't be preinserting we mustn't be preinserting you mustn't be preinserting they mustn't be preinserting
Perfect	V-ing perfect
I mustn't have preinserted you mustn't have preinserted she mustn't have preinserted we mustn't have preinserted you mustn't have preinserted they mustn't have preinserted	I mustn't have been preinserting you mustn't have been preinserting she mustn't have been preinserting we mustn't have been preinserting you mustn't have been preinserting they mustn't have been preinserting

Interrogative form

Simple form	V-ing form
must I preinsert? must you preinsert? must she preinsert? must we preinsert? must you preinsert? must they preinsert?	must I be preinserting? must you be preinserting? must she be preinserting? must we be preinserting? must you be preinserting? must they be preinserting?
Perfect	V-ing perfect
must I have preinserted? must you have preinserted? must she have preinserted? must we have preinserted? must you have preinserted? must they have preinserted?	must I have been preinserting? must you have been preinserting? must she have been preinserting? must we have been preinserting? must you have been preinserting? must they have been preinserting?

Interro-negative form

Simple form	V-ing form
mustn't I preinsert? mustn't you preinsert? mustn't she preinsert? mustn't we preinsert? mustn't you preinsert? mustn't they preinsert?	mustn't I be preinserting? mustn't you be preinserting? mustn't she be preinserting? mustn't we be preinserting? mustn't you be preinserting? mustn't they be preinserting?
Perfect	V-ing perfect
mustn't I have preinserted? mustn't you have preinserted? mustn't she have preinserted? mustn't we have preinserted? mustn't you have preinserted? mustn't they have preinserted?	mustn't I have been preinserting? mustn't you have been preinserting? mustn't she have been preinserting? mustn't we have been preinserting? mustn't you have been preinserting? mustn't they have been preinserting?