I must discount you must discount he must discount we must discount you must discount they must discount
V-ing form
I must be discounting you must be discounting he must be discounting we must be discounting you must be discounting they must be discounting
Perfect
I must have discounted you must have discounted he must have discounted we must have discounted you must have discounted they must have discounted
V-ing perfect
I must have been discounting you must have been discounting he must have been discounting we must have been discounting you must have been discounting they must have been discounting
Negation
Simple form
I must not discount you must not discount he must not discount we must not discount you must not discount they must not discount
V-ing form
I must not be discounting you must not be discounting he must not be discounting we must not be discounting you must not be discounting they must not be discounting
Perfect
I must not have discounted you must not have discounted he must not have discounted we must not have discounted you must not have discounted they must not have discounted
V-ing perfect
I must not have been discounting you must not have been discounting he must not have been discounting we must not have been discounting you must not have been discounting they must not have been discounting
Interrogative form
Simple form
must I discount? must you discount? must he discount? must we discount? must you discount? must they discount?
V-ing form
must I be discounting? must you be discounting? must he be discounting? must we be discounting? must you be discounting? must they be discounting?
Perfect
must I have discounted? must you have discounted? must he have discounted? must we have discounted? must you have discounted? must they have discounted?
V-ing perfect
must I have been discounting? must you have been discounting? must he have been discounting? must we have been discounting? must you have been discounting? must they have been discounting?
Interro-negative form
Simple form
must I not discount? must you not discount? must he not discount? must we not discount? must you not discount? must they not discount?
V-ing form
must I not be discounting? must you not be discounting? must he not be discounting? must we not be discounting? must you not be discounting? must they not be discounting?
Perfect
must I not have discounted? must you not have discounted? must he not have discounted? must we not have discounted? must you not have discounted? must they not have discounted?
V-ing perfect
must I not have been discounting? must you not have been discounting? must he not have been discounting? must we not have been discounting? must you not have been discounting? must they not have been discounting?