I must spancel you must spancel he must spancel we must spancel you must spancel they must spancel
V-ing form
I must be spanceling you must be spanceling he must be spanceling we must be spanceling you must be spanceling they must be spanceling
Perfect
I must have spanceled you must have spanceled he must have spanceled we must have spanceled you must have spanceled they must have spanceled
V-ing perfect
I must have been spanceling you must have been spanceling he must have been spanceling we must have been spanceling you must have been spanceling they must have been spanceling
Negation
Simple form
I must not spancel you must not spancel he must not spancel we must not spancel you must not spancel they must not spancel
V-ing form
I must not be spanceling you must not be spanceling he must not be spanceling we must not be spanceling you must not be spanceling they must not be spanceling
Perfect
I must not have spanceled you must not have spanceled he must not have spanceled we must not have spanceled you must not have spanceled they must not have spanceled
V-ing perfect
I must not have been spanceling you must not have been spanceling he must not have been spanceling we must not have been spanceling you must not have been spanceling they must not have been spanceling
Interrogative form
Simple form
must I spancel? must you spancel? must he spancel? must we spancel? must you spancel? must they spancel?
V-ing form
must I be spanceling? must you be spanceling? must he be spanceling? must we be spanceling? must you be spanceling? must they be spanceling?
Perfect
must I have spanceled? must you have spanceled? must he have spanceled? must we have spanceled? must you have spanceled? must they have spanceled?
V-ing perfect
must I have been spanceling? must you have been spanceling? must he have been spanceling? must we have been spanceling? must you have been spanceling? must they have been spanceling?
Interro-negative form
Simple form
must I not spancel? must you not spancel? must he not spancel? must we not spancel? must you not spancel? must they not spancel?
V-ing form
must I not be spanceling? must you not be spanceling? must he not be spanceling? must we not be spanceling? must you not be spanceling? must they not be spanceling?
Perfect
must I not have spanceled? must you not have spanceled? must he not have spanceled? must we not have spanceled? must you not have spanceled? must they not have spanceled?
V-ing perfect
must I not have been spanceling? must you not have been spanceling? must he not have been spanceling? must we not have been spanceling? must you not have been spanceling? must they not have been spanceling?