English verb conjugation
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Regular verb: trick - tricked - tricked

Affirmation

Simple form	V-ing form
I must trick you must trick he must trick we must trick you must trick they must trick	I must be tricking you must be tricking he must be tricking we must be tricking you must be tricking they must be tricking
Perfect	V-ing perfect
I must have tricked you must have tricked he must have tricked we must have tricked you must have tricked they must have tricked	I must have been tricking you must have been tricking he must have been tricking we must have been tricking you must have been tricking they must have been tricking

Negation

Simple form	V-ing form
I mustn't trick you mustn't trick he mustn't trick we mustn't trick you mustn't trick they mustn't trick	I mustn't be tricking you mustn't be tricking he mustn't be tricking we mustn't be tricking you mustn't be tricking they mustn't be tricking
Perfect	V-ing perfect
I mustn't have tricked you mustn't have tricked he mustn't have tricked we mustn't have tricked you mustn't have tricked they mustn't have tricked	I mustn't have been tricking you mustn't have been tricking he mustn't have been tricking we mustn't have been tricking you mustn't have been tricking they mustn't have been tricking

Interrogative form

Simple form	V-ing form
must I trick? must you trick? must he trick? must we trick? must you trick? must they trick?	must I be tricking? must you be tricking? must he be tricking? must we be tricking? must you be tricking? must they be tricking?
Perfect	V-ing perfect
must I have tricked? must you have tricked? must he have tricked? must we have tricked? must you have tricked? must they have tricked?	must I have been tricking? must you have been tricking? must he have been tricking? must we have been tricking? must you have been tricking? must they have been tricking?

Interro-negative form

Simple form	V-ing form
mustn't I trick? mustn't you trick? mustn't he trick? mustn't we trick? mustn't you trick? mustn't they trick?	mustn't I be tricking? mustn't you be tricking? mustn't he be tricking? mustn't we be tricking? mustn't you be tricking? mustn't they be tricking?
Perfect	V-ing perfect
mustn't I have tricked? mustn't you have tricked? mustn't he have tricked? mustn't we have tricked? mustn't you have tricked? mustn't they have tricked?	mustn't I have been tricking? mustn't you have been tricking? mustn't he have been tricking? mustn't we have been tricking? mustn't you have been tricking? mustn't they have been tricking?