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