English verb conjugation
MUST FLUB

Regular verb: flub - flubed - flubed

Affirmation

Simple form	V-ing form
I must flub you must flub she must flub we must flub you must flub they must flub	I must be flubing you must be flubing she must be flubing we must be flubing you must be flubing they must be flubing
Perfect	V-ing perfect
I must have flubed you must have flubed she must have flubed we must have flubed you must have flubed they must have flubed	I must have been flubing you must have been flubing she must have been flubing we must have been flubing you must have been flubing they must have been flubing

Negation

Simple form	V-ing form
I must not flub you must not flub she must not flub we must not flub you must not flub they must not flub	I must not be flubing you must not be flubing she must not be flubing we must not be flubing you must not be flubing they must not be flubing
Perfect	V-ing perfect
I must not have flubed you must not have flubed she must not have flubed we must not have flubed you must not have flubed they must not have flubed	I must not have been flubing you must not have been flubing she must not have been flubing we must not have been flubing you must not have been flubing they must not have been flubing

Interrogative form

Simple form	V-ing form
must I flub? must you flub? must she flub? must we flub? must you flub? must they flub?	must I be flubing? must you be flubing? must she be flubing? must we be flubing? must you be flubing? must they be flubing?
Perfect	V-ing perfect
must I have flubed? must you have flubed? must she have flubed? must we have flubed? must you have flubed? must they have flubed?	must I have been flubing? must you have been flubing? must she have been flubing? must we have been flubing? must you have been flubing? must they have been flubing?

Interro-negative form

Simple form	V-ing form
must I not flub? must you not flub? must she not flub? must we not flub? must you not flub? must they not flub?	must I not be flubing? must you not be flubing? must she not be flubing? must we not be flubing? must you not be flubing? must they not be flubing?
Perfect	V-ing perfect
must I not have flubed? must you not have flubed? must she not have flubed? must we not have flubed? must you not have flubed? must they not have flubed?	must I not have been flubing? must you not have been flubing? must she not have been flubing? must we not have been flubing? must you not have been flubing? must they not have been flubing?