English verb conjugation
MUST SCUFFLE

Regular verb: scuffle - scuffled - scuffled

Affirmation

Simple form	V-ing form
I must scuffle you must scuffle he must scuffle we must scuffle you must scuffle they must scuffle	I must be scuffling you must be scuffling he must be scuffling we must be scuffling you must be scuffling they must be scuffling
Perfect	V-ing perfect
I must have scuffled you must have scuffled he must have scuffled we must have scuffled you must have scuffled they must have scuffled	I must have been scuffling you must have been scuffling he must have been scuffling we must have been scuffling you must have been scuffling they must have been scuffling

Negation

Simple form	V-ing form
I mustn't scuffle you mustn't scuffle he mustn't scuffle we mustn't scuffle you mustn't scuffle they mustn't scuffle	I mustn't be scuffling you mustn't be scuffling he mustn't be scuffling we mustn't be scuffling you mustn't be scuffling they mustn't be scuffling
Perfect	V-ing perfect
I mustn't have scuffled you mustn't have scuffled he mustn't have scuffled we mustn't have scuffled you mustn't have scuffled they mustn't have scuffled	I mustn't have been scuffling you mustn't have been scuffling he mustn't have been scuffling we mustn't have been scuffling you mustn't have been scuffling they mustn't have been scuffling

Interrogative form

Simple form	V-ing form
must I scuffle? must you scuffle? must he scuffle? must we scuffle? must you scuffle? must they scuffle?	must I be scuffling? must you be scuffling? must he be scuffling? must we be scuffling? must you be scuffling? must they be scuffling?
Perfect	V-ing perfect
must I have scuffled? must you have scuffled? must he have scuffled? must we have scuffled? must you have scuffled? must they have scuffled?	must I have been scuffling? must you have been scuffling? must he have been scuffling? must we have been scuffling? must you have been scuffling? must they have been scuffling?

Interro-negative form

Simple form	V-ing form
mustn't I scuffle? mustn't you scuffle? mustn't he scuffle? mustn't we scuffle? mustn't you scuffle? mustn't they scuffle?	mustn't I be scuffling? mustn't you be scuffling? mustn't he be scuffling? mustn't we be scuffling? mustn't you be scuffling? mustn't they be scuffling?
Perfect	V-ing perfect
mustn't I have scuffled? mustn't you have scuffled? mustn't he have scuffled? mustn't we have scuffled? mustn't you have scuffled? mustn't they have scuffled?	mustn't I have been scuffling? mustn't you have been scuffling? mustn't he have been scuffling? mustn't we have been scuffling? mustn't you have been scuffling? mustn't they have been scuffling?