I must rot you must rot he must rot we must rot you must rot they must rot
V-ing form
I must be rotting you must be rotting he must be rotting we must be rotting you must be rotting they must be rotting
Perfect
I must have rotted you must have rotted he must have rotted we must have rotted you must have rotted they must have rotted
V-ing perfect
I must have been rotting you must have been rotting he must have been rotting we must have been rotting you must have been rotting they must have been rotting
Negation
Simple form
I must not rot you must not rot he must not rot we must not rot you must not rot they must not rot
V-ing form
I must not be rotting you must not be rotting he must not be rotting we must not be rotting you must not be rotting they must not be rotting
Perfect
I must not have rotted you must not have rotted he must not have rotted we must not have rotted you must not have rotted they must not have rotted
V-ing perfect
I must not have been rotting you must not have been rotting he must not have been rotting we must not have been rotting you must not have been rotting they must not have been rotting
Interrogative form
Simple form
must I rot? must you rot? must he rot? must we rot? must you rot? must they rot?
V-ing form
must I be rotting? must you be rotting? must he be rotting? must we be rotting? must you be rotting? must they be rotting?
Perfect
must I have rotted? must you have rotted? must he have rotted? must we have rotted? must you have rotted? must they have rotted?
V-ing perfect
must I have been rotting? must you have been rotting? must he have been rotting? must we have been rotting? must you have been rotting? must they have been rotting?
Interro-negative form
Simple form
must I not rot? must you not rot? must he not rot? must we not rot? must you not rot? must they not rot?
V-ing form
must I not be rotting? must you not be rotting? must he not be rotting? must we not be rotting? must you not be rotting? must they not be rotting?
Perfect
must I not have rotted? must you not have rotted? must he not have rotted? must we not have rotted? must you not have rotted? must they not have rotted?
V-ing perfect
must I not have been rotting? must you not have been rotting? must he not have been rotting? must we not have been rotting? must you not have been rotting? must they not have been rotting?