English verb conjugation
MUST EXCRETE

Regular verb: excrete - excreted - excreted

Affirmation

Simple form	V-ing form
I must excrete you must excrete he must excrete we must excrete you must excrete they must excrete	I must be excreting you must be excreting he must be excreting we must be excreting you must be excreting they must be excreting
Perfect	V-ing perfect
I must have excreted you must have excreted he must have excreted we must have excreted you must have excreted they must have excreted	I must have been excreting you must have been excreting he must have been excreting we must have been excreting you must have been excreting they must have been excreting

Negation

Simple form	V-ing form
I mustn't excrete you mustn't excrete he mustn't excrete we mustn't excrete you mustn't excrete they mustn't excrete	I mustn't be excreting you mustn't be excreting he mustn't be excreting we mustn't be excreting you mustn't be excreting they mustn't be excreting
Perfect	V-ing perfect
I mustn't have excreted you mustn't have excreted he mustn't have excreted we mustn't have excreted you mustn't have excreted they mustn't have excreted	I mustn't have been excreting you mustn't have been excreting he mustn't have been excreting we mustn't have been excreting you mustn't have been excreting they mustn't have been excreting

Interrogative form

Simple form	V-ing form
must I excrete? must you excrete? must he excrete? must we excrete? must you excrete? must they excrete?	must I be excreting? must you be excreting? must he be excreting? must we be excreting? must you be excreting? must they be excreting?
Perfect	V-ing perfect
must I have excreted? must you have excreted? must he have excreted? must we have excreted? must you have excreted? must they have excreted?	must I have been excreting? must you have been excreting? must he have been excreting? must we have been excreting? must you have been excreting? must they have been excreting?

Interro-negative form

Simple form	V-ing form
mustn't I excrete? mustn't you excrete? mustn't he excrete? mustn't we excrete? mustn't you excrete? mustn't they excrete?	mustn't I be excreting? mustn't you be excreting? mustn't he be excreting? mustn't we be excreting? mustn't you be excreting? mustn't they be excreting?
Perfect	V-ing perfect
mustn't I have excreted? mustn't you have excreted? mustn't he have excreted? mustn't we have excreted? mustn't you have excreted? mustn't they have excreted?	mustn't I have been excreting? mustn't you have been excreting? mustn't he have been excreting? mustn't we have been excreting? mustn't you have been excreting? mustn't they have been excreting?