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