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