I must tambour you must tambour she must tambour we must tambour you must tambour they must tambour
V-ing form
I must be tambouring you must be tambouring she must be tambouring we must be tambouring you must be tambouring they must be tambouring
Perfect
I must have tamboured you must have tamboured she must have tamboured we must have tamboured you must have tamboured they must have tamboured
V-ing perfect
I must have been tambouring you must have been tambouring she must have been tambouring we must have been tambouring you must have been tambouring they must have been tambouring
Negation
Simple form
I must not tambour you must not tambour she must not tambour we must not tambour you must not tambour they must not tambour
V-ing form
I must not be tambouring you must not be tambouring she must not be tambouring we must not be tambouring you must not be tambouring they must not be tambouring
Perfect
I must not have tamboured you must not have tamboured she must not have tamboured we must not have tamboured you must not have tamboured they must not have tamboured
V-ing perfect
I must not have been tambouring you must not have been tambouring she must not have been tambouring we must not have been tambouring you must not have been tambouring they must not have been tambouring
Interrogative form
Simple form
must I tambour? must you tambour? must she tambour? must we tambour? must you tambour? must they tambour?
V-ing form
must I be tambouring? must you be tambouring? must she be tambouring? must we be tambouring? must you be tambouring? must they be tambouring?
Perfect
must I have tamboured? must you have tamboured? must she have tamboured? must we have tamboured? must you have tamboured? must they have tamboured?
V-ing perfect
must I have been tambouring? must you have been tambouring? must she have been tambouring? must we have been tambouring? must you have been tambouring? must they have been tambouring?
Interro-negative form
Simple form
must I not tambour? must you not tambour? must she not tambour? must we not tambour? must you not tambour? must they not tambour?
V-ing form
must I not be tambouring? must you not be tambouring? must she not be tambouring? must we not be tambouring? must you not be tambouring? must they not be tambouring?
Perfect
must I not have tamboured? must you not have tamboured? must she not have tamboured? must we not have tamboured? must you not have tamboured? must they not have tamboured?
V-ing perfect
must I not have been tambouring? must you not have been tambouring? must she not have been tambouring? must we not have been tambouring? must you not have been tambouring? must they not have been tambouring?