English verb conjugation
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Regular verb: formulate - formulated - formulated

Affirmation

Simple form	V-ing form
I must formulate you must formulate he must formulate we must formulate you must formulate they must formulate	I must be formulating you must be formulating he must be formulating we must be formulating you must be formulating they must be formulating
Perfect	V-ing perfect
I must have formulated you must have formulated he must have formulated we must have formulated you must have formulated they must have formulated	I must have been formulating you must have been formulating he must have been formulating we must have been formulating you must have been formulating they must have been formulating

Negation

Simple form	V-ing form
I mustn't formulate you mustn't formulate he mustn't formulate we mustn't formulate you mustn't formulate they mustn't formulate	I mustn't be formulating you mustn't be formulating he mustn't be formulating we mustn't be formulating you mustn't be formulating they mustn't be formulating
Perfect	V-ing perfect
I mustn't have formulated you mustn't have formulated he mustn't have formulated we mustn't have formulated you mustn't have formulated they mustn't have formulated	I mustn't have been formulating you mustn't have been formulating he mustn't have been formulating we mustn't have been formulating you mustn't have been formulating they mustn't have been formulating

Interrogative form

Simple form	V-ing form
must I formulate? must you formulate? must he formulate? must we formulate? must you formulate? must they formulate?	must I be formulating? must you be formulating? must he be formulating? must we be formulating? must you be formulating? must they be formulating?
Perfect	V-ing perfect
must I have formulated? must you have formulated? must he have formulated? must we have formulated? must you have formulated? must they have formulated?	must I have been formulating? must you have been formulating? must he have been formulating? must we have been formulating? must you have been formulating? must they have been formulating?

Interro-negative form

Simple form	V-ing form
mustn't I formulate? mustn't you formulate? mustn't he formulate? mustn't we formulate? mustn't you formulate? mustn't they formulate?	mustn't I be formulating? mustn't you be formulating? mustn't he be formulating? mustn't we be formulating? mustn't you be formulating? mustn't they be formulating?
Perfect	V-ing perfect
mustn't I have formulated? mustn't you have formulated? mustn't he have formulated? mustn't we have formulated? mustn't you have formulated? mustn't they have formulated?	mustn't I have been formulating? mustn't you have been formulating? mustn't he have been formulating? mustn't we have been formulating? mustn't you have been formulating? mustn't they have been formulating?