I must kayak you must kayak she must kayak we must kayak you must kayak they must kayak
V-ing form
I must be kayaking you must be kayaking she must be kayaking we must be kayaking you must be kayaking they must be kayaking
Perfect
I must have kayaked you must have kayaked she must have kayaked we must have kayaked you must have kayaked they must have kayaked
V-ing perfect
I must have been kayaking you must have been kayaking she must have been kayaking we must have been kayaking you must have been kayaking they must have been kayaking
Negation
Simple form
I must not kayak you must not kayak she must not kayak we must not kayak you must not kayak they must not kayak
V-ing form
I must not be kayaking you must not be kayaking she must not be kayaking we must not be kayaking you must not be kayaking they must not be kayaking
Perfect
I must not have kayaked you must not have kayaked she must not have kayaked we must not have kayaked you must not have kayaked they must not have kayaked
V-ing perfect
I must not have been kayaking you must not have been kayaking she must not have been kayaking we must not have been kayaking you must not have been kayaking they must not have been kayaking
Interrogative form
Simple form
must I kayak? must you kayak? must she kayak? must we kayak? must you kayak? must they kayak?
V-ing form
must I be kayaking? must you be kayaking? must she be kayaking? must we be kayaking? must you be kayaking? must they be kayaking?
Perfect
must I have kayaked? must you have kayaked? must she have kayaked? must we have kayaked? must you have kayaked? must they have kayaked?
V-ing perfect
must I have been kayaking? must you have been kayaking? must she have been kayaking? must we have been kayaking? must you have been kayaking? must they have been kayaking?
Interro-negative form
Simple form
must I not kayak? must you not kayak? must she not kayak? must we not kayak? must you not kayak? must they not kayak?
V-ing form
must I not be kayaking? must you not be kayaking? must she not be kayaking? must we not be kayaking? must you not be kayaking? must they not be kayaking?
Perfect
must I not have kayaked? must you not have kayaked? must she not have kayaked? must we not have kayaked? must you not have kayaked? must they not have kayaked?
V-ing perfect
must I not have been kayaking? must you not have been kayaking? must she not have been kayaking? must we not have been kayaking? must you not have been kayaking? must they not have been kayaking?