I must root you must root he must root we must root you must root they must root
V-ing form
I must be rooting you must be rooting he must be rooting we must be rooting you must be rooting they must be rooting
Perfect
I must have rooted you must have rooted he must have rooted we must have rooted you must have rooted they must have rooted
V-ing perfect
I must have been rooting you must have been rooting he must have been rooting we must have been rooting you must have been rooting they must have been rooting
Negation
Simple form
I must not root you must not root he must not root we must not root you must not root they must not root
V-ing form
I must not be rooting you must not be rooting he must not be rooting we must not be rooting you must not be rooting they must not be rooting
Perfect
I must not have rooted you must not have rooted he must not have rooted we must not have rooted you must not have rooted they must not have rooted
V-ing perfect
I must not have been rooting you must not have been rooting he must not have been rooting we must not have been rooting you must not have been rooting they must not have been rooting
Interrogative form
Simple form
must I root? must you root? must he root? must we root? must you root? must they root?
V-ing form
must I be rooting? must you be rooting? must he be rooting? must we be rooting? must you be rooting? must they be rooting?
Perfect
must I have rooted? must you have rooted? must he have rooted? must we have rooted? must you have rooted? must they have rooted?
V-ing perfect
must I have been rooting? must you have been rooting? must he have been rooting? must we have been rooting? must you have been rooting? must they have been rooting?
Interro-negative form
Simple form
must I not root? must you not root? must he not root? must we not root? must you not root? must they not root?
V-ing form
must I not be rooting? must you not be rooting? must he not be rooting? must we not be rooting? must you not be rooting? must they not be rooting?
Perfect
must I not have rooted? must you not have rooted? must he not have rooted? must we not have rooted? must you not have rooted? must they not have rooted?
V-ing perfect
must I not have been rooting? must you not have been rooting? must he not have been rooting? must we not have been rooting? must you not have been rooting? must they not have been rooting?