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