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