I must root you must root she must root we must root you must root they must root
V-ing form
I must be rooting you must be rooting she must be rooting we must be rooting you must be rooting they must be rooting
Perfect
I must have rooted you must have rooted she 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 she 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 she 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 she 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 she 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 she 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 she root? must we root? must you root? must they root?
V-ing form
must I be rooting? must you be rooting? must she be rooting? must we be rooting? must you be rooting? must they be rooting?
Perfect
must I have rooted? must you have rooted? must she 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 she 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 she 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 she 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 she 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 she not have been rooting? must we not have been rooting? must you not have been rooting? must they not have been rooting?