I must level you must level she must level we must level you must level they must level
V-ing form
I must be levelling you must be levelling she must be levelling we must be levelling you must be levelling they must be levelling
Perfect
I must have levelled you must have levelled she must have levelled we must have levelled you must have levelled they must have levelled
V-ing perfect
I must have been levelling you must have been levelling she must have been levelling we must have been levelling you must have been levelling they must have been levelling
Negation
Simple form
I must not level you must not level she must not level we must not level you must not level they must not level
V-ing form
I must not be levelling you must not be levelling she must not be levelling we must not be levelling you must not be levelling they must not be levelling
Perfect
I must not have levelled you must not have levelled she must not have levelled we must not have levelled you must not have levelled they must not have levelled
V-ing perfect
I must not have been levelling you must not have been levelling she must not have been levelling we must not have been levelling you must not have been levelling they must not have been levelling
Interrogative form
Simple form
must I level? must you level? must she level? must we level? must you level? must they level?
V-ing form
must I be levelling? must you be levelling? must she be levelling? must we be levelling? must you be levelling? must they be levelling?
Perfect
must I have levelled? must you have levelled? must she have levelled? must we have levelled? must you have levelled? must they have levelled?
V-ing perfect
must I have been levelling? must you have been levelling? must she have been levelling? must we have been levelling? must you have been levelling? must they have been levelling?
Interro-negative form
Simple form
must I not level? must you not level? must she not level? must we not level? must you not level? must they not level?
V-ing form
must I not be levelling? must you not be levelling? must she not be levelling? must we not be levelling? must you not be levelling? must they not be levelling?
Perfect
must I not have levelled? must you not have levelled? must she not have levelled? must we not have levelled? must you not have levelled? must they not have levelled?
V-ing perfect
must I not have been levelling? must you not have been levelling? must she not have been levelling? must we not have been levelling? must you not have been levelling? must they not have been levelling?