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