English verb conjugation
MUST MARBLE

Regular verb: marble - marbled - marbled

Affirmation

Simple form	V-ing form
I must marble you must marble he must marble we must marble you must marble they must marble	I must be marbling you must be marbling he must be marbling we must be marbling you must be marbling they must be marbling
Perfect	V-ing perfect
I must have marbled you must have marbled he must have marbled we must have marbled you must have marbled they must have marbled	I must have been marbling you must have been marbling he must have been marbling we must have been marbling you must have been marbling they must have been marbling

Negation

Simple form	V-ing form
I mustn't marble you mustn't marble he mustn't marble we mustn't marble you mustn't marble they mustn't marble	I mustn't be marbling you mustn't be marbling he mustn't be marbling we mustn't be marbling you mustn't be marbling they mustn't be marbling
Perfect	V-ing perfect
I mustn't have marbled you mustn't have marbled he mustn't have marbled we mustn't have marbled you mustn't have marbled they mustn't have marbled	I mustn't have been marbling you mustn't have been marbling he mustn't have been marbling we mustn't have been marbling you mustn't have been marbling they mustn't have been marbling

Interrogative form

Simple form	V-ing form
must I marble? must you marble? must he marble? must we marble? must you marble? must they marble?	must I be marbling? must you be marbling? must he be marbling? must we be marbling? must you be marbling? must they be marbling?
Perfect	V-ing perfect
must I have marbled? must you have marbled? must he have marbled? must we have marbled? must you have marbled? must they have marbled?	must I have been marbling? must you have been marbling? must he have been marbling? must we have been marbling? must you have been marbling? must they have been marbling?

Interro-negative form

Simple form	V-ing form
mustn't I marble? mustn't you marble? mustn't he marble? mustn't we marble? mustn't you marble? mustn't they marble?	mustn't I be marbling? mustn't you be marbling? mustn't he be marbling? mustn't we be marbling? mustn't you be marbling? mustn't they be marbling?
Perfect	V-ing perfect
mustn't I have marbled? mustn't you have marbled? mustn't he have marbled? mustn't we have marbled? mustn't you have marbled? mustn't they have marbled?	mustn't I have been marbling? mustn't you have been marbling? mustn't he have been marbling? mustn't we have been marbling? mustn't you have been marbling? mustn't they have been marbling?