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 must not commend you must not commend he must not commend we must not commend you must not commend they must not commend
V-ing form
I must not be commending you must not be commending he must not be commending we must not be commending you must not be commending they must not be commending
Perfect
I must not have commended you must not have commended he must not have commended we must not have commended you must not have commended they must not have commended
V-ing perfect
I must not have been commending you must not have been commending he must not have been commending we must not have been commending you must not have been commending they must not 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
must I not commend? must you not commend? must he not commend? must we not commend? must you not commend? must they not commend?
V-ing form
must I not be commending? must you not be commending? must he not be commending? must we not be commending? must you not be commending? must they not be commending?
Perfect
must I not have commended? must you not have commended? must he not have commended? must we not have commended? must you not have commended? must they not have commended?
V-ing perfect
must I not have been commending? must you not have been commending? must he not have been commending? must we not have been commending? must you not have been commending? must they not have been commending?