English verb conjugation
MUST BLUB

Regular verb: blub - blubed - blubed

Affirmation

Simple form	V-ing form
I must blub you must blub he must blub we must blub you must blub they must blub	I must be blubing you must be blubing he must be blubing we must be blubing you must be blubing they must be blubing
Perfect	V-ing perfect
I must have blubed you must have blubed he must have blubed we must have blubed you must have blubed they must have blubed	I must have been blubing you must have been blubing he must have been blubing we must have been blubing you must have been blubing they must have been blubing

Negation

Simple form	V-ing form
I must not blub you must not blub he must not blub we must not blub you must not blub they must not blub	I must not be blubing you must not be blubing he must not be blubing we must not be blubing you must not be blubing they must not be blubing
Perfect	V-ing perfect
I must not have blubed you must not have blubed he must not have blubed we must not have blubed you must not have blubed they must not have blubed	I must not have been blubing you must not have been blubing he must not have been blubing we must not have been blubing you must not have been blubing they must not have been blubing

Interrogative form

Simple form	V-ing form
must I blub? must you blub? must he blub? must we blub? must you blub? must they blub?	must I be blubing? must you be blubing? must he be blubing? must we be blubing? must you be blubing? must they be blubing?
Perfect	V-ing perfect
must I have blubed? must you have blubed? must he have blubed? must we have blubed? must you have blubed? must they have blubed?	must I have been blubing? must you have been blubing? must he have been blubing? must we have been blubing? must you have been blubing? must they have been blubing?

Interro-negative form

Simple form	V-ing form
must I not blub? must you not blub? must he not blub? must we not blub? must you not blub? must they not blub?	must I not be blubing? must you not be blubing? must he not be blubing? must we not be blubing? must you not be blubing? must they not be blubing?
Perfect	V-ing perfect
must I not have blubed? must you not have blubed? must he not have blubed? must we not have blubed? must you not have blubed? must they not have blubed?	must I not have been blubing? must you not have been blubing? must he not have been blubing? must we not have been blubing? must you not have been blubing? must they not have been blubing?