English verb conjugation
MUST FIN

Regular verb: fin - fined - fined

Affirmation

Simple form	V-ing form
I must fin you must fin he must fin we must fin you must fin they must fin	I must be fining you must be fining he must be fining we must be fining you must be fining they must be fining
Perfect	V-ing perfect
I must have fined you must have fined he must have fined we must have fined you must have fined they must have fined	I must have been fining you must have been fining he must have been fining we must have been fining you must have been fining they must have been fining

Negation

Simple form	V-ing form
I mustn't fin you mustn't fin he mustn't fin we mustn't fin you mustn't fin they mustn't fin	I mustn't be fining you mustn't be fining he mustn't be fining we mustn't be fining you mustn't be fining they mustn't be fining
Perfect	V-ing perfect
I mustn't have fined you mustn't have fined he mustn't have fined we mustn't have fined you mustn't have fined they mustn't have fined	I mustn't have been fining you mustn't have been fining he mustn't have been fining we mustn't have been fining you mustn't have been fining they mustn't have been fining

Interrogative form

Simple form	V-ing form
must I fin? must you fin? must he fin? must we fin? must you fin? must they fin?	must I be fining? must you be fining? must he be fining? must we be fining? must you be fining? must they be fining?
Perfect	V-ing perfect
must I have fined? must you have fined? must he have fined? must we have fined? must you have fined? must they have fined?	must I have been fining? must you have been fining? must he have been fining? must we have been fining? must you have been fining? must they have been fining?

Interro-negative form

Simple form	V-ing form
mustn't I fin? mustn't you fin? mustn't he fin? mustn't we fin? mustn't you fin? mustn't they fin?	mustn't I be fining? mustn't you be fining? mustn't he be fining? mustn't we be fining? mustn't you be fining? mustn't they be fining?
Perfect	V-ing perfect
mustn't I have fined? mustn't you have fined? mustn't he have fined? mustn't we have fined? mustn't you have fined? mustn't they have fined?	mustn't I have been fining? mustn't you have been fining? mustn't he have been fining? mustn't we have been fining? mustn't you have been fining? mustn't they have been fining?