English verb conjugation
MUST EXPERIMENT

Regular verb: experiment - experimented - experimented

Affirmation

Simple form	V-ing form
I must experiment you must experiment he must experiment we must experiment you must experiment they must experiment	I must be experimenting you must be experimenting he must be experimenting we must be experimenting you must be experimenting they must be experimenting
Perfect	V-ing perfect
I must have experimented you must have experimented he must have experimented we must have experimented you must have experimented they must have experimented	I must have been experimenting you must have been experimenting he must have been experimenting we must have been experimenting you must have been experimenting they must have been experimenting

Negation

Simple form	V-ing form
I mustn't experiment you mustn't experiment he mustn't experiment we mustn't experiment you mustn't experiment they mustn't experiment	I mustn't be experimenting you mustn't be experimenting he mustn't be experimenting we mustn't be experimenting you mustn't be experimenting they mustn't be experimenting
Perfect	V-ing perfect
I mustn't have experimented you mustn't have experimented he mustn't have experimented we mustn't have experimented you mustn't have experimented they mustn't have experimented	I mustn't have been experimenting you mustn't have been experimenting he mustn't have been experimenting we mustn't have been experimenting you mustn't have been experimenting they mustn't have been experimenting

Interrogative form

Simple form	V-ing form
must I experiment? must you experiment? must he experiment? must we experiment? must you experiment? must they experiment?	must I be experimenting? must you be experimenting? must he be experimenting? must we be experimenting? must you be experimenting? must they be experimenting?
Perfect	V-ing perfect
must I have experimented? must you have experimented? must he have experimented? must we have experimented? must you have experimented? must they have experimented?	must I have been experimenting? must you have been experimenting? must he have been experimenting? must we have been experimenting? must you have been experimenting? must they have been experimenting?

Interro-negative form

Simple form	V-ing form
mustn't I experiment? mustn't you experiment? mustn't he experiment? mustn't we experiment? mustn't you experiment? mustn't they experiment?	mustn't I be experimenting? mustn't you be experimenting? mustn't he be experimenting? mustn't we be experimenting? mustn't you be experimenting? mustn't they be experimenting?
Perfect	V-ing perfect
mustn't I have experimented? mustn't you have experimented? mustn't he have experimented? mustn't we have experimented? mustn't you have experimented? mustn't they have experimented?	mustn't I have been experimenting? mustn't you have been experimenting? mustn't he have been experimenting? mustn't we have been experimenting? mustn't you have been experimenting? mustn't they have been experimenting?