English verb conjugation
MUST TUG

Regular verb: tug - tugged - tugged

Affirmation

Simple form	V-ing form
I must tug you must tug she must tug we must tug you must tug they must tug	I must be tugging you must be tugging she must be tugging we must be tugging you must be tugging they must be tugging
Perfect	V-ing perfect
I must have tugged you must have tugged she must have tugged we must have tugged you must have tugged they must have tugged	I must have been tugging you must have been tugging she must have been tugging we must have been tugging you must have been tugging they must have been tugging

Negation

Simple form	V-ing form
I mustn't tug you mustn't tug she mustn't tug we mustn't tug you mustn't tug they mustn't tug	I mustn't be tugging you mustn't be tugging she mustn't be tugging we mustn't be tugging you mustn't be tugging they mustn't be tugging
Perfect	V-ing perfect
I mustn't have tugged you mustn't have tugged she mustn't have tugged we mustn't have tugged you mustn't have tugged they mustn't have tugged	I mustn't have been tugging you mustn't have been tugging she mustn't have been tugging we mustn't have been tugging you mustn't have been tugging they mustn't have been tugging

Interrogative form

Simple form	V-ing form
must I tug? must you tug? must she tug? must we tug? must you tug? must they tug?	must I be tugging? must you be tugging? must she be tugging? must we be tugging? must you be tugging? must they be tugging?
Perfect	V-ing perfect
must I have tugged? must you have tugged? must she have tugged? must we have tugged? must you have tugged? must they have tugged?	must I have been tugging? must you have been tugging? must she have been tugging? must we have been tugging? must you have been tugging? must they have been tugging?

Interro-negative form

Simple form	V-ing form
mustn't I tug? mustn't you tug? mustn't she tug? mustn't we tug? mustn't you tug? mustn't they tug?	mustn't I be tugging? mustn't you be tugging? mustn't she be tugging? mustn't we be tugging? mustn't you be tugging? mustn't they be tugging?
Perfect	V-ing perfect
mustn't I have tugged? mustn't you have tugged? mustn't she have tugged? mustn't we have tugged? mustn't you have tugged? mustn't they have tugged?	mustn't I have been tugging? mustn't you have been tugging? mustn't she have been tugging? mustn't we have been tugging? mustn't you have been tugging? mustn't they have been tugging?