English verb conjugation
MUST SWAMP

Regular verb: swamp - swamped - swamped

Affirmation

Simple form	V-ing form
I must swamp you must swamp he must swamp we must swamp you must swamp they must swamp	I must be swamping you must be swamping he must be swamping we must be swamping you must be swamping they must be swamping
Perfect	V-ing perfect
I must have swamped you must have swamped he must have swamped we must have swamped you must have swamped they must have swamped	I must have been swamping you must have been swamping he must have been swamping we must have been swamping you must have been swamping they must have been swamping

Negation

Simple form	V-ing form
I mustn't swamp you mustn't swamp he mustn't swamp we mustn't swamp you mustn't swamp they mustn't swamp	I mustn't be swamping you mustn't be swamping he mustn't be swamping we mustn't be swamping you mustn't be swamping they mustn't be swamping
Perfect	V-ing perfect
I mustn't have swamped you mustn't have swamped he mustn't have swamped we mustn't have swamped you mustn't have swamped they mustn't have swamped	I mustn't have been swamping you mustn't have been swamping he mustn't have been swamping we mustn't have been swamping you mustn't have been swamping they mustn't have been swamping

Interrogative form

Simple form	V-ing form
must I swamp? must you swamp? must he swamp? must we swamp? must you swamp? must they swamp?	must I be swamping? must you be swamping? must he be swamping? must we be swamping? must you be swamping? must they be swamping?
Perfect	V-ing perfect
must I have swamped? must you have swamped? must he have swamped? must we have swamped? must you have swamped? must they have swamped?	must I have been swamping? must you have been swamping? must he have been swamping? must we have been swamping? must you have been swamping? must they have been swamping?

Interro-negative form

Simple form	V-ing form
mustn't I swamp? mustn't you swamp? mustn't he swamp? mustn't we swamp? mustn't you swamp? mustn't they swamp?	mustn't I be swamping? mustn't you be swamping? mustn't he be swamping? mustn't we be swamping? mustn't you be swamping? mustn't they be swamping?
Perfect	V-ing perfect
mustn't I have swamped? mustn't you have swamped? mustn't he have swamped? mustn't we have swamped? mustn't you have swamped? mustn't they have swamped?	mustn't I have been swamping? mustn't you have been swamping? mustn't he have been swamping? mustn't we have been swamping? mustn't you have been swamping? mustn't they have been swamping?