I must misunderstand you must misunderstand she must misunderstand we must misunderstand you must misunderstand they must misunderstand
V-ing form
I must be misunderstanding you must be misunderstanding she must be misunderstanding we must be misunderstanding you must be misunderstanding they must be misunderstanding
Perfect
I must have misunderstood you must have misunderstood she must have misunderstood we must have misunderstood you must have misunderstood they must have misunderstood
V-ing perfect
I must have been misunderstanding you must have been misunderstanding she must have been misunderstanding we must have been misunderstanding you must have been misunderstanding they must have been misunderstanding
Negation
Simple form
I must not misunderstand you must not misunderstand she must not misunderstand we must not misunderstand you must not misunderstand they must not misunderstand
V-ing form
I must not be misunderstanding you must not be misunderstanding she must not be misunderstanding we must not be misunderstanding you must not be misunderstanding they must not be misunderstanding
Perfect
I must not have misunderstood you must not have misunderstood she must not have misunderstood we must not have misunderstood you must not have misunderstood they must not have misunderstood
V-ing perfect
I must not have been misunderstanding you must not have been misunderstanding she must not have been misunderstanding we must not have been misunderstanding you must not have been misunderstanding they must not have been misunderstanding
Interrogative form
Simple form
must I misunderstand? must you misunderstand? must she misunderstand? must we misunderstand? must you misunderstand? must they misunderstand?
V-ing form
must I be misunderstanding? must you be misunderstanding? must she be misunderstanding? must we be misunderstanding? must you be misunderstanding? must they be misunderstanding?
Perfect
must I have misunderstood? must you have misunderstood? must she have misunderstood? must we have misunderstood? must you have misunderstood? must they have misunderstood?
V-ing perfect
must I have been misunderstanding? must you have been misunderstanding? must she have been misunderstanding? must we have been misunderstanding? must you have been misunderstanding? must they have been misunderstanding?
Interro-negative form
Simple form
must I not misunderstand? must you not misunderstand? must she not misunderstand? must we not misunderstand? must you not misunderstand? must they not misunderstand?
V-ing form
must I not be misunderstanding? must you not be misunderstanding? must she not be misunderstanding? must we not be misunderstanding? must you not be misunderstanding? must they not be misunderstanding?
Perfect
must I not have misunderstood? must you not have misunderstood? must she not have misunderstood? must we not have misunderstood? must you not have misunderstood? must they not have misunderstood?
V-ing perfect
must I not have been misunderstanding? must you not have been misunderstanding? must she not have been misunderstanding? must we not have been misunderstanding? must you not have been misunderstanding? must they not have been misunderstanding?