I must line you must line he must line we must line you must line they must line
V-ing form
I must be lining you must be lining he must be lining we must be lining you must be lining they must be lining
Perfect
I must have lined you must have lined he must have lined we must have lined you must have lined they must have lined
V-ing perfect
I must have been lining you must have been lining he must have been lining we must have been lining you must have been lining they must have been lining
Negation
Simple form
I must not line you must not line he must not line we must not line you must not line they must not line
V-ing form
I must not be lining you must not be lining he must not be lining we must not be lining you must not be lining they must not be lining
Perfect
I must not have lined you must not have lined he must not have lined we must not have lined you must not have lined they must not have lined
V-ing perfect
I must not have been lining you must not have been lining he must not have been lining we must not have been lining you must not have been lining they must not have been lining
Interrogative form
Simple form
must I line? must you line? must he line? must we line? must you line? must they line?
V-ing form
must I be lining? must you be lining? must he be lining? must we be lining? must you be lining? must they be lining?
Perfect
must I have lined? must you have lined? must he have lined? must we have lined? must you have lined? must they have lined?
V-ing perfect
must I have been lining? must you have been lining? must he have been lining? must we have been lining? must you have been lining? must they have been lining?
Interro-negative form
Simple form
must I not line? must you not line? must he not line? must we not line? must you not line? must they not line?
V-ing form
must I not be lining? must you not be lining? must he not be lining? must we not be lining? must you not be lining? must they not be lining?
Perfect
must I not have lined? must you not have lined? must he not have lined? must we not have lined? must you not have lined? must they not have lined?
V-ing perfect
must I not have been lining? must you not have been lining? must he not have been lining? must we not have been lining? must you not have been lining? must they not have been lining?