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 must not contrast you must not contrast he must not contrast we must not contrast you must not contrast they must not contrast
V-ing form
I must not be contrasting you must not be contrasting he must not be contrasting we must not be contrasting you must not be contrasting they must not be contrasting
Perfect
I must not have contrasted you must not have contrasted he must not have contrasted we must not have contrasted you must not have contrasted they must not have contrasted
V-ing perfect
I must not have been contrasting you must not have been contrasting he must not have been contrasting we must not have been contrasting you must not have been contrasting they must not 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
must I not contrast? must you not contrast? must he not contrast? must we not contrast? must you not contrast? must they not contrast?
V-ing form
must I not be contrasting? must you not be contrasting? must he not be contrasting? must we not be contrasting? must you not be contrasting? must they not be contrasting?
Perfect
must I not have contrasted? must you not have contrasted? must he not have contrasted? must we not have contrasted? must you not have contrasted? must they not have contrasted?
V-ing perfect
must I not have been contrasting? must you not have been contrasting? must he not have been contrasting? must we not have been contrasting? must you not have been contrasting? must they not have been contrasting?