English verb conjugation
MUST FETTLE

Regular verb: fettle - fettled - fettled

Affirmation

Simple form	V-ing form
I must fettle you must fettle he must fettle we must fettle you must fettle they must fettle	I must be fettling you must be fettling he must be fettling we must be fettling you must be fettling they must be fettling
Perfect	V-ing perfect
I must have fettled you must have fettled he must have fettled we must have fettled you must have fettled they must have fettled	I must have been fettling you must have been fettling he must have been fettling we must have been fettling you must have been fettling they must have been fettling

Negation

Simple form	V-ing form
I mustn't fettle you mustn't fettle he mustn't fettle we mustn't fettle you mustn't fettle they mustn't fettle	I mustn't be fettling you mustn't be fettling he mustn't be fettling we mustn't be fettling you mustn't be fettling they mustn't be fettling
Perfect	V-ing perfect
I mustn't have fettled you mustn't have fettled he mustn't have fettled we mustn't have fettled you mustn't have fettled they mustn't have fettled	I mustn't have been fettling you mustn't have been fettling he mustn't have been fettling we mustn't have been fettling you mustn't have been fettling they mustn't have been fettling

Interrogative form

Simple form	V-ing form
must I fettle? must you fettle? must he fettle? must we fettle? must you fettle? must they fettle?	must I be fettling? must you be fettling? must he be fettling? must we be fettling? must you be fettling? must they be fettling?
Perfect	V-ing perfect
must I have fettled? must you have fettled? must he have fettled? must we have fettled? must you have fettled? must they have fettled?	must I have been fettling? must you have been fettling? must he have been fettling? must we have been fettling? must you have been fettling? must they have been fettling?

Interro-negative form

Simple form	V-ing form
mustn't I fettle? mustn't you fettle? mustn't he fettle? mustn't we fettle? mustn't you fettle? mustn't they fettle?	mustn't I be fettling? mustn't you be fettling? mustn't he be fettling? mustn't we be fettling? mustn't you be fettling? mustn't they be fettling?
Perfect	V-ing perfect
mustn't I have fettled? mustn't you have fettled? mustn't he have fettled? mustn't we have fettled? mustn't you have fettled? mustn't they have fettled?	mustn't I have been fettling? mustn't you have been fettling? mustn't he have been fettling? mustn't we have been fettling? mustn't you have been fettling? mustn't they have been fettling?