English verb conjugation
MUST UNCLASP

Regular verb: unclasp - unclasped - unclasped

Affirmation

Simple form	V-ing form
I must unclasp you must unclasp he must unclasp we must unclasp you must unclasp they must unclasp	I must be unclasping you must be unclasping he must be unclasping we must be unclasping you must be unclasping they must be unclasping
Perfect	V-ing perfect
I must have unclasped you must have unclasped he must have unclasped we must have unclasped you must have unclasped they must have unclasped	I must have been unclasping you must have been unclasping he must have been unclasping we must have been unclasping you must have been unclasping they must have been unclasping

Negation

Simple form	V-ing form
I mustn't unclasp you mustn't unclasp he mustn't unclasp we mustn't unclasp you mustn't unclasp they mustn't unclasp	I mustn't be unclasping you mustn't be unclasping he mustn't be unclasping we mustn't be unclasping you mustn't be unclasping they mustn't be unclasping
Perfect	V-ing perfect
I mustn't have unclasped you mustn't have unclasped he mustn't have unclasped we mustn't have unclasped you mustn't have unclasped they mustn't have unclasped	I mustn't have been unclasping you mustn't have been unclasping he mustn't have been unclasping we mustn't have been unclasping you mustn't have been unclasping they mustn't have been unclasping

Interrogative form

Simple form	V-ing form
must I unclasp? must you unclasp? must he unclasp? must we unclasp? must you unclasp? must they unclasp?	must I be unclasping? must you be unclasping? must he be unclasping? must we be unclasping? must you be unclasping? must they be unclasping?
Perfect	V-ing perfect
must I have unclasped? must you have unclasped? must he have unclasped? must we have unclasped? must you have unclasped? must they have unclasped?	must I have been unclasping? must you have been unclasping? must he have been unclasping? must we have been unclasping? must you have been unclasping? must they have been unclasping?

Interro-negative form

Simple form	V-ing form
mustn't I unclasp? mustn't you unclasp? mustn't he unclasp? mustn't we unclasp? mustn't you unclasp? mustn't they unclasp?	mustn't I be unclasping? mustn't you be unclasping? mustn't he be unclasping? mustn't we be unclasping? mustn't you be unclasping? mustn't they be unclasping?
Perfect	V-ing perfect
mustn't I have unclasped? mustn't you have unclasped? mustn't he have unclasped? mustn't we have unclasped? mustn't you have unclasped? mustn't they have unclasped?	mustn't I have been unclasping? mustn't you have been unclasping? mustn't he have been unclasping? mustn't we have been unclasping? mustn't you have been unclasping? mustn't they have been unclasping?