I must surprise you must surprise he must surprise we must surprise you must surprise they must surprise
V-ing form
I must be surprising you must be surprising he must be surprising we must be surprising you must be surprising they must be surprising
Perfect
I must have surprised you must have surprised he must have surprised we must have surprised you must have surprised they must have surprised
V-ing perfect
I must have been surprising you must have been surprising he must have been surprising we must have been surprising you must have been surprising they must have been surprising
Negation
Simple form
I must not surprise you must not surprise he must not surprise we must not surprise you must not surprise they must not surprise
V-ing form
I must not be surprising you must not be surprising he must not be surprising we must not be surprising you must not be surprising they must not be surprising
Perfect
I must not have surprised you must not have surprised he must not have surprised we must not have surprised you must not have surprised they must not have surprised
V-ing perfect
I must not have been surprising you must not have been surprising he must not have been surprising we must not have been surprising you must not have been surprising they must not have been surprising
Interrogative form
Simple form
must I surprise? must you surprise? must he surprise? must we surprise? must you surprise? must they surprise?
V-ing form
must I be surprising? must you be surprising? must he be surprising? must we be surprising? must you be surprising? must they be surprising?
Perfect
must I have surprised? must you have surprised? must he have surprised? must we have surprised? must you have surprised? must they have surprised?
V-ing perfect
must I have been surprising? must you have been surprising? must he have been surprising? must we have been surprising? must you have been surprising? must they have been surprising?
Interro-negative form
Simple form
must I not surprise? must you not surprise? must he not surprise? must we not surprise? must you not surprise? must they not surprise?
V-ing form
must I not be surprising? must you not be surprising? must he not be surprising? must we not be surprising? must you not be surprising? must they not be surprising?
Perfect
must I not have surprised? must you not have surprised? must he not have surprised? must we not have surprised? must you not have surprised? must they not have surprised?
V-ing perfect
must I not have been surprising? must you not have been surprising? must he not have been surprising? must we not have been surprising? must you not have been surprising? must they not have been surprising?