English verb conjugation
MUST SCULL

Regular verb: scull - sculled - sculled

Affirmation

Simple form	V-ing form
I must scull you must scull he must scull we must scull you must scull they must scull	I must be sculling you must be sculling he must be sculling we must be sculling you must be sculling they must be sculling
Perfect	V-ing perfect
I must have sculled you must have sculled he must have sculled we must have sculled you must have sculled they must have sculled	I must have been sculling you must have been sculling he must have been sculling we must have been sculling you must have been sculling they must have been sculling

Negation

Simple form	V-ing form
I mustn't scull you mustn't scull he mustn't scull we mustn't scull you mustn't scull they mustn't scull	I mustn't be sculling you mustn't be sculling he mustn't be sculling we mustn't be sculling you mustn't be sculling they mustn't be sculling
Perfect	V-ing perfect
I mustn't have sculled you mustn't have sculled he mustn't have sculled we mustn't have sculled you mustn't have sculled they mustn't have sculled	I mustn't have been sculling you mustn't have been sculling he mustn't have been sculling we mustn't have been sculling you mustn't have been sculling they mustn't have been sculling

Interrogative form

Simple form	V-ing form
must I scull? must you scull? must he scull? must we scull? must you scull? must they scull?	must I be sculling? must you be sculling? must he be sculling? must we be sculling? must you be sculling? must they be sculling?
Perfect	V-ing perfect
must I have sculled? must you have sculled? must he have sculled? must we have sculled? must you have sculled? must they have sculled?	must I have been sculling? must you have been sculling? must he have been sculling? must we have been sculling? must you have been sculling? must they have been sculling?

Interro-negative form

Simple form	V-ing form
mustn't I scull? mustn't you scull? mustn't he scull? mustn't we scull? mustn't you scull? mustn't they scull?	mustn't I be sculling? mustn't you be sculling? mustn't he be sculling? mustn't we be sculling? mustn't you be sculling? mustn't they be sculling?
Perfect	V-ing perfect
mustn't I have sculled? mustn't you have sculled? mustn't he have sculled? mustn't we have sculled? mustn't you have sculled? mustn't they have sculled?	mustn't I have been sculling? mustn't you have been sculling? mustn't he have been sculling? mustn't we have been sculling? mustn't you have been sculling? mustn't they have been sculling?