English verb conjugation
MUST DIG

Irregular verb: dig - dug - dug

Affirmation

Simple form	V-ing form
I must dig you must dig she must dig we must dig you must dig they must dig	I must be digging you must be digging she must be digging we must be digging you must be digging they must be digging
Perfect	V-ing perfect
I must have dug you must have dug she must have dug we must have dug you must have dug they must have dug	I must have been digging you must have been digging she must have been digging we must have been digging you must have been digging they must have been digging

Negation

Simple form	V-ing form
I mustn't dig you mustn't dig she mustn't dig we mustn't dig you mustn't dig they mustn't dig	I mustn't be digging you mustn't be digging she mustn't be digging we mustn't be digging you mustn't be digging they mustn't be digging
Perfect	V-ing perfect
I mustn't have dug you mustn't have dug she mustn't have dug we mustn't have dug you mustn't have dug they mustn't have dug	I mustn't have been digging you mustn't have been digging she mustn't have been digging we mustn't have been digging you mustn't have been digging they mustn't have been digging

Interrogative form

Simple form	V-ing form
must I dig? must you dig? must she dig? must we dig? must you dig? must they dig?	must I be digging? must you be digging? must she be digging? must we be digging? must you be digging? must they be digging?
Perfect	V-ing perfect
must I have dug? must you have dug? must she have dug? must we have dug? must you have dug? must they have dug?	must I have been digging? must you have been digging? must she have been digging? must we have been digging? must you have been digging? must they have been digging?

Interro-negative form

Simple form	V-ing form
mustn't I dig? mustn't you dig? mustn't she dig? mustn't we dig? mustn't you dig? mustn't they dig?	mustn't I be digging? mustn't you be digging? mustn't she be digging? mustn't we be digging? mustn't you be digging? mustn't they be digging?
Perfect	V-ing perfect
mustn't I have dug? mustn't you have dug? mustn't she have dug? mustn't we have dug? mustn't you have dug? mustn't they have dug?	mustn't I have been digging? mustn't you have been digging? mustn't she have been digging? mustn't we have been digging? mustn't you have been digging? mustn't they have been digging?