English verb conjugation
MUST TOMB

Regular verb: tomb - tombed - tombed

Affirmation

Simple form	V-ing form
I must tomb you must tomb he must tomb we must tomb you must tomb they must tomb	I must be tombing you must be tombing he must be tombing we must be tombing you must be tombing they must be tombing
Perfect	V-ing perfect
I must have tombed you must have tombed he must have tombed we must have tombed you must have tombed they must have tombed	I must have been tombing you must have been tombing he must have been tombing we must have been tombing you must have been tombing they must have been tombing

Negation

Simple form	V-ing form
I mustn't tomb you mustn't tomb he mustn't tomb we mustn't tomb you mustn't tomb they mustn't tomb	I mustn't be tombing you mustn't be tombing he mustn't be tombing we mustn't be tombing you mustn't be tombing they mustn't be tombing
Perfect	V-ing perfect
I mustn't have tombed you mustn't have tombed he mustn't have tombed we mustn't have tombed you mustn't have tombed they mustn't have tombed	I mustn't have been tombing you mustn't have been tombing he mustn't have been tombing we mustn't have been tombing you mustn't have been tombing they mustn't have been tombing

Interrogative form

Simple form	V-ing form
must I tomb? must you tomb? must he tomb? must we tomb? must you tomb? must they tomb?	must I be tombing? must you be tombing? must he be tombing? must we be tombing? must you be tombing? must they be tombing?
Perfect	V-ing perfect
must I have tombed? must you have tombed? must he have tombed? must we have tombed? must you have tombed? must they have tombed?	must I have been tombing? must you have been tombing? must he have been tombing? must we have been tombing? must you have been tombing? must they have been tombing?

Interro-negative form

Simple form	V-ing form
mustn't I tomb? mustn't you tomb? mustn't he tomb? mustn't we tomb? mustn't you tomb? mustn't they tomb?	mustn't I be tombing? mustn't you be tombing? mustn't he be tombing? mustn't we be tombing? mustn't you be tombing? mustn't they be tombing?
Perfect	V-ing perfect
mustn't I have tombed? mustn't you have tombed? mustn't he have tombed? mustn't we have tombed? mustn't you have tombed? mustn't they have tombed?	mustn't I have been tombing? mustn't you have been tombing? mustn't he have been tombing? mustn't we have been tombing? mustn't you have been tombing? mustn't they have been tombing?