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