I must pasture you must pasture she must pasture we must pasture you must pasture they must pasture
V-ing form
I must be pasturing you must be pasturing she must be pasturing we must be pasturing you must be pasturing they must be pasturing
Perfect
I must have pastured you must have pastured she must have pastured we must have pastured you must have pastured they must have pastured
V-ing perfect
I must have been pasturing you must have been pasturing she must have been pasturing we must have been pasturing you must have been pasturing they must have been pasturing
Negation
Simple form
I mustn't pasture you mustn't pasture she mustn't pasture we mustn't pasture you mustn't pasture they mustn't pasture
V-ing form
I mustn't be pasturing you mustn't be pasturing she mustn't be pasturing we mustn't be pasturing you mustn't be pasturing they mustn't be pasturing
Perfect
I mustn't have pastured you mustn't have pastured she mustn't have pastured we mustn't have pastured you mustn't have pastured they mustn't have pastured
V-ing perfect
I mustn't have been pasturing you mustn't have been pasturing she mustn't have been pasturing we mustn't have been pasturing you mustn't have been pasturing they mustn't have been pasturing
Interrogative form
Simple form
must I pasture? must you pasture? must she pasture? must we pasture? must you pasture? must they pasture?
V-ing form
must I be pasturing? must you be pasturing? must she be pasturing? must we be pasturing? must you be pasturing? must they be pasturing?
Perfect
must I have pastured? must you have pastured? must she have pastured? must we have pastured? must you have pastured? must they have pastured?
V-ing perfect
must I have been pasturing? must you have been pasturing? must she have been pasturing? must we have been pasturing? must you have been pasturing? must they have been pasturing?
Interro-negative form
Simple form
mustn't I pasture? mustn't you pasture? mustn't she pasture? mustn't we pasture? mustn't you pasture? mustn't they pasture?
V-ing form
mustn't I be pasturing? mustn't you be pasturing? mustn't she be pasturing? mustn't we be pasturing? mustn't you be pasturing? mustn't they be pasturing?
Perfect
mustn't I have pastured? mustn't you have pastured? mustn't she have pastured? mustn't we have pastured? mustn't you have pastured? mustn't they have pastured?
V-ing perfect
mustn't I have been pasturing? mustn't you have been pasturing? mustn't she have been pasturing? mustn't we have been pasturing? mustn't you have been pasturing? mustn't they have been pasturing?