I must kernel you must kernel she must kernel we must kernel you must kernel they must kernel
V-ing form
I must be kerneling you must be kerneling she must be kerneling we must be kerneling you must be kerneling they must be kerneling
Perfect
I must have kerneled you must have kerneled she must have kerneled we must have kerneled you must have kerneled they must have kerneled
V-ing perfect
I must have been kerneling you must have been kerneling she must have been kerneling we must have been kerneling you must have been kerneling they must have been kerneling
Negation
Simple form
I must not kernel you must not kernel she must not kernel we must not kernel you must not kernel they must not kernel
V-ing form
I must not be kerneling you must not be kerneling she must not be kerneling we must not be kerneling you must not be kerneling they must not be kerneling
Perfect
I must not have kerneled you must not have kerneled she must not have kerneled we must not have kerneled you must not have kerneled they must not have kerneled
V-ing perfect
I must not have been kerneling you must not have been kerneling she must not have been kerneling we must not have been kerneling you must not have been kerneling they must not have been kerneling
Interrogative form
Simple form
must I kernel? must you kernel? must she kernel? must we kernel? must you kernel? must they kernel?
V-ing form
must I be kerneling? must you be kerneling? must she be kerneling? must we be kerneling? must you be kerneling? must they be kerneling?
Perfect
must I have kerneled? must you have kerneled? must she have kerneled? must we have kerneled? must you have kerneled? must they have kerneled?
V-ing perfect
must I have been kerneling? must you have been kerneling? must she have been kerneling? must we have been kerneling? must you have been kerneling? must they have been kerneling?
Interro-negative form
Simple form
must I not kernel? must you not kernel? must she not kernel? must we not kernel? must you not kernel? must they not kernel?
V-ing form
must I not be kerneling? must you not be kerneling? must she not be kerneling? must we not be kerneling? must you not be kerneling? must they not be kerneling?
Perfect
must I not have kerneled? must you not have kerneled? must she not have kerneled? must we not have kerneled? must you not have kerneled? must they not have kerneled?
V-ing perfect
must I not have been kerneling? must you not have been kerneling? must she not have been kerneling? must we not have been kerneling? must you not have been kerneling? must they not have been kerneling?