I must sunbathe you must sunbathe she must sunbathe we must sunbathe you must sunbathe they must sunbathe
V-ing form
I must be sunbathing you must be sunbathing she must be sunbathing we must be sunbathing you must be sunbathing they must be sunbathing
Perfect
I must have sunbathed you must have sunbathed she must have sunbathed we must have sunbathed you must have sunbathed they must have sunbathed
V-ing perfect
I must have been sunbathing you must have been sunbathing she must have been sunbathing we must have been sunbathing you must have been sunbathing they must have been sunbathing
Negation
Simple form
I must not sunbathe you must not sunbathe she must not sunbathe we must not sunbathe you must not sunbathe they must not sunbathe
V-ing form
I must not be sunbathing you must not be sunbathing she must not be sunbathing we must not be sunbathing you must not be sunbathing they must not be sunbathing
Perfect
I must not have sunbathed you must not have sunbathed she must not have sunbathed we must not have sunbathed you must not have sunbathed they must not have sunbathed
V-ing perfect
I must not have been sunbathing you must not have been sunbathing she must not have been sunbathing we must not have been sunbathing you must not have been sunbathing they must not have been sunbathing
Interrogative form
Simple form
must I sunbathe? must you sunbathe? must she sunbathe? must we sunbathe? must you sunbathe? must they sunbathe?
V-ing form
must I be sunbathing? must you be sunbathing? must she be sunbathing? must we be sunbathing? must you be sunbathing? must they be sunbathing?
Perfect
must I have sunbathed? must you have sunbathed? must she have sunbathed? must we have sunbathed? must you have sunbathed? must they have sunbathed?
V-ing perfect
must I have been sunbathing? must you have been sunbathing? must she have been sunbathing? must we have been sunbathing? must you have been sunbathing? must they have been sunbathing?
Interro-negative form
Simple form
must I not sunbathe? must you not sunbathe? must she not sunbathe? must we not sunbathe? must you not sunbathe? must they not sunbathe?
V-ing form
must I not be sunbathing? must you not be sunbathing? must she not be sunbathing? must we not be sunbathing? must you not be sunbathing? must they not be sunbathing?
Perfect
must I not have sunbathed? must you not have sunbathed? must she not have sunbathed? must we not have sunbathed? must you not have sunbathed? must they not have sunbathed?
V-ing perfect
must I not have been sunbathing? must you not have been sunbathing? must she not have been sunbathing? must we not have been sunbathing? must you not have been sunbathing? must they not have been sunbathing?