I must shovel you must shovel he must shovel we must shovel you must shovel they must shovel
V-ing form
I must be shovelling you must be shovelling he must be shovelling we must be shovelling you must be shovelling they must be shovelling
Perfect
I must have shovelled you must have shovelled he must have shovelled we must have shovelled you must have shovelled they must have shovelled
V-ing perfect
I must have been shovelling you must have been shovelling he must have been shovelling we must have been shovelling you must have been shovelling they must have been shovelling
Negation
Simple form
I mustn't shovel you mustn't shovel he mustn't shovel we mustn't shovel you mustn't shovel they mustn't shovel
V-ing form
I mustn't be shovelling you mustn't be shovelling he mustn't be shovelling we mustn't be shovelling you mustn't be shovelling they mustn't be shovelling
Perfect
I mustn't have shovelled you mustn't have shovelled he mustn't have shovelled we mustn't have shovelled you mustn't have shovelled they mustn't have shovelled
V-ing perfect
I mustn't have been shovelling you mustn't have been shovelling he mustn't have been shovelling we mustn't have been shovelling you mustn't have been shovelling they mustn't have been shovelling
Interrogative form
Simple form
must I shovel? must you shovel? must he shovel? must we shovel? must you shovel? must they shovel?
V-ing form
must I be shovelling? must you be shovelling? must he be shovelling? must we be shovelling? must you be shovelling? must they be shovelling?
Perfect
must I have shovelled? must you have shovelled? must he have shovelled? must we have shovelled? must you have shovelled? must they have shovelled?
V-ing perfect
must I have been shovelling? must you have been shovelling? must he have been shovelling? must we have been shovelling? must you have been shovelling? must they have been shovelling?
Interro-negative form
Simple form
mustn't I shovel? mustn't you shovel? mustn't he shovel? mustn't we shovel? mustn't you shovel? mustn't they shovel?
V-ing form
mustn't I be shovelling? mustn't you be shovelling? mustn't he be shovelling? mustn't we be shovelling? mustn't you be shovelling? mustn't they be shovelling?
Perfect
mustn't I have shovelled? mustn't you have shovelled? mustn't he have shovelled? mustn't we have shovelled? mustn't you have shovelled? mustn't they have shovelled?
V-ing perfect
mustn't I have been shovelling? mustn't you have been shovelling? mustn't he have been shovelling? mustn't we have been shovelling? mustn't you have been shovelling? mustn't they have been shovelling?